B07	150 Attack	1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.Be3 c6 5.Qd2
A12	A12	1.c4 c6 2.Nf3 d5 3.b3
A14	A14	1.c4 e6 2.Nf3 d5 3.g3 Nf6 4.Bg2 Be7
A16	A16	1.c4 Nf6 2.Nc3
A33	A33	1.c4 c5 2.Nf3 Nf6 3.d4 cxd4 4.Nxd4 e6 5.Nc3 Nc6
A42	A42	1.d4 d6 2.c4
A59	A59	1.d4 Nf6 2.c4 c5 3.d5 b5 4.cxb5 a6 5.bxa6 Bxa6 6.Nc3 d6 7.e4
A61	A61	1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3
A62	A62	1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.Nf3 g6 7.g3
A63	A63	1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.Nf3 g6 7.g3 Bg7 8.Bg2 O-O 9.O-O a6
A64	A64	1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.Nf3 g6 7.g3 Bg7 8.Bg2 O-O 9.O-O a6 10.a4 Nbd7 11.Nd2
A68	A68	1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.e4 g6 7.f4 Bg7 8.Nf3
A69	A69	1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.e4 g6 7.f4 Bg7 8.Nf3 O-O 9.Be2 Re8
A71	A71	1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.e4 g6 7.Nf3 Bg7 8.Bg5
A72	A72	1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.e4 g6 7.Nf3 Bg7 8.Be2
A73	A73	1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.e4 g6 7.Nf3 Bg7 8.Be2 O-O 9.O-O
A74	A74	1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.e4 g6 7.Nf3 Bg7 8.Be2 O-O 9.O-O a6
A77	A77	1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.e4 g6 7.Nf3 Bg7 8.Be2 O-O 9.O-O Re8 10.Nd2
A78	A78	1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.e4 g6 7.Nf3 Bg7 8.Be2 O-O 9.O-O Re8 10.Nd2 Na6
A79	A79	1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.e4 g6 7.Nf3 Bg7 8.Be2 O-O 9.O-O Re8 10.Nd2 Na6 11.f3
A84	A84	1.d4 f5 2.c4
A85	A85	1.d4 f5 2.c4 g6 3.Nc3
A87	A87	1.d4 f5 2.c4 Nf6 3.g3 g6 4.Bg2 Bg7 5.Nf3
A90	A90	1.d4 f5 2.c4 Nf6 3.g3 e6
A91	A91	1.d4 f5 2.c4 Nf6 3.g3 e6 4.Bg2 Be7
A92	A92	1.d4 f5 2.c4 Nf6 3.g3 e6 4.Bg2 Be7 5.Nf3
A94	A94	1.d4 f5 2.c4 Nf6 3.g3 e6 4.Bg2 Be7 5.Nf3 O-O 6.O-O d5 7.b3 c6
A95	A95	1.d4 f5 2.c4 Nf6 3.g3 e6 4.Bg2 Be7 5.Nf3 O-O 6.O-O d5 7.Nc3
A96	A96	1.d4 f5 2.c4 Nf6 3.g3 e6 4.Bg2 Be7 5.Nf3 O-O 6.O-O d6
A98	A98	1.d4 f5 2.c4 Nf6 3.g3 e6 4.Bg2 Be7 5.Nf3 O-O 6.O-O d6 7.Nc3 Qe8 8.Qc2
A99	A99	1.d4 f5 2.c4 Nf6 3.g3 e6 4.Bg2 Be7 5.Nf3 O-O 6.O-O d6 7.Nc3 Qe8 8.b3
B00	Aachen Gambit, Nimzovich Defense	1.e4 Nc6 2.d4 d5 3.exd5 Nb4
A00	Aasum Gambit; Hector Gambit	1.Nc3 d5 2.e4 dxe4 3.Bc4
C36	Abbazia Defense, KGA	1.e4 e5 2.f4 exf4 3.Nf3 d5 4.exd5 Nf6
A06	Abonyi Gambit; Tennison Gambit; Lemberg Gambit; Zukertort Gambit	1.Nf3 d5 2.e4
A52	Abonyi Variation, Budapest	1.d4 Nf6 2.c4 e5 3.dxe5 Ng4 4.e4 Nxe5 5.f4 Nec6
B20	Abrahams Variation, Sicilian Wing Gambit	1.e4 c5 2.b4 cxb4 3.Bb2
D31	Abrahams; Noteboom; Klaus Junge Var, QGD	1.d4 d5 2.c4 e6 3.Nc3 c6 4.Nf3 dxc4 5.a4 Bb4 6.e3 b5 7.Bd2 a5
E70	Accelerated Averbakh Variation, KID	1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Bg5
B34	Accelerated Dragon; Fianchetto Var; B34	1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 g6
D28	Accelerated Fianchetto, QGA	1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.e3 e6 5.Bxc4 c5 6.O-O a6 7.Qe2 b5
B06	Accelerated Gurgenidze	1.e4 g6 2.d4 Bg7 3.Nf3 d6 3.Nc3 c6
B27	Accelerated Paulsen, Sicilian	1.e4 c5 2.Nf3 Qc7
D81	Accelerated Russian Variation, Grunfeld; D81	1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Qb3
E24	Accelerated Saemisch Variation, Nimzo-Indian	1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.a3 Bxc3+ 5.bxc3
B41	Accelerated Wimpy Variation, Sicilian	1.e4 c5 2.Nf3 e6 3.d4 cxd4
D45	Acclerated Meran, QGD	1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.e3 a6
B27	Action Extension, Sicilian	1.e4 c5 2.Nf3 g6 3.c4 Bh6
C81	Adam Variation, Ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Nxe4 6.d4 b5 7.Bb3 d5 8.dxe5 Be6 9.Qe2 Be7 10.c4
B90	Adams Attack, Sicilian	1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.h3
B00	Adams Defense	1.e4 Nh6
C27	Adams Gambit, Vienna	1.e4 e5 2.Nc3 Nf6 3.Bc4 Nxe4 4.Qh5 Nd6 5.Bb3 Nc6 6.d4
A52	Adler Variation, Budapest	1.d4 Nf6 2.c4 e5 3.dxe5 Ng4 4.Nf3
D70	Adjorjan Gambit	1.d4 Nf6 2.c4 g6 3.d5 b5
A10	Adorjan System, English	1.c4 g6 2.e4 e5
D15	Advance System, Slav	1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 c5
B12	Advance Variation, Caro	1.e4 c6 2.d4 d5 3.e5
C02	Advance Variation, French; C02	1.e4 e6 2.d4 d5 3.e5
B29	Advance Variation, Sicilian	1.e4 c5 2.Nf3 Nf6 3.e5
D34	Advance Variation, Tarrasch	1.d4 d5 2.c4 e6 3.Nc3 c5 4.cxd5 exd5 5.Nf3 Nc6 6.g3 Nf6 7.Bg2 Be7 8.O-O O-O 9.Bg5 c4
C02	Advance; Nimzovich; Steinitz Var, Fr	1.e4 e6 2.d4 d5 3.e5 Bd7
A13	Agincourt Variation, English	1.c4 e6 2.Nf3 d5 3.g3
A53	Aged Gibbon Gambit	1.d4 Nf6 2.c4 d6 3.g4
A13	Agincourt; Kurajica Defense, English; A13	1.c4 e6
A00	Akahi Variation	1.e3 e5 2.Nc3 Nf6 3.f4 exf4 4.Nf3
C60	Alapin Defense, Ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 Bb4
B20	Alapin Formation, Smith-Morra Declined, Sicilian	1.e4 c5 2.d4 cxd4 3.c3 Nf6
C60	Alapin Gambit, Ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 Bb4 4.c3 Ba5 5.Bxc6 dxc6
C68	Alapin Gambit, Ruy Lopez Exchange	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Bxc6 dxc6 5.O-O Bg4 6.h3 h5
C20	Alapin Opening	1.e4 e5 2.Ne2
C14	Alapin Variation, French	1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bg5 Be7 5.e5 Nfd7 6.Bxe7 Qxe7 7.Nb5
D08	Alapin Variation, QGD	1.d4 d5 2.c4 e5 3.dxe5 d4 4.Nf3 Nc6 5.Nbd2
D31	Alapin Variation, QGD	1.d4 d5 2.c4 e6 3.Nc3 b6
C73	Alapin Variation, Ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 d6 5.Bxc6+ bxc6 6.d4 f6
D16	Alapin Variation, Slav; D16	1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 dxc4 5.a4
C25	Alapin Variation, Vienna	1.e4 e5 2.Nc3 Nc6 3.f4
B22	Alapin; Sveshnikov Var, Sicilian; B22	1.e4 c5 2.c3
A80	Alapin; Ulvestad; Manhattan; Kmoch Variation, Dutch	1.d4 f5 2.Qd3
C00	Alapin; Witaker Gambit, French	1.e4 e6 2.d4 d5 3.Be3
C41	Alapin-Blackburne Gambit, Philidor	1.e4 e5 2.Nf3 d6 3.d4 Bg4 4.dxe5 Nd7
C00	Alapin-Diemer Gambit, French	1.e4 e6 2.d4 d5 3.Be3 dxe4 4.f3
C70	Alapin's Defense Deferred, Ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Bb4
D44	Alatortsev System, Semi-Slav	1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.Bg5 dxc4 6.e4 b5 7.e5 h6 8.Bh4 g5 9.Nxg5 Nd5
D31	Alatortsev; Petrosian, Charousek Var, QGD	1.d4 d5 2.c4 e6 3.Nc3 Be7
D08	Albin Countergambit; Cavalotti Var, QGD; D08	1.d4 d5 2.c4 e5
C53	Albin Gambit, Italian	1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.c3 Nf6 5.O-O
C14	Albin-Chatard Gambit, French	1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bg5 Be7 5.e5 Nfd7 6.h4 Bxg5 7.hxg5 Qxg5
D00	Albrecht; Karlshruhle Defense, BDG	1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 g6
D00	Alburt Defense, QP	1.d4 d5 2.Nc3 Bf5
B04	Alburt Variation, Alekhine	1.e4 Nf6 2.e5 Nd5 3.d4 d6 4.Nf3 g6
C15	Alekhine (Maroczy) Variation, French	1.e4 e6 2.d4 d5 3.Nc3 Bb4 4.Ne2
D10	Alekhine Attack, Slav	1.d4 d5 2.c4 c6 3.Nc3 dxc4 4.e4
D06	Alekhine Defense, QGD	1.d4 d5 2.c4 g6
D51	Alekhine Gambit, QGD	1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Nbd7 5.Nf3 h6 6.Bh4 dxc4
C45	Alekhine Gambit, Scotch	1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Nxd4 Nf6 5.e5
B74	Alekhine Line, Sicilian Dragon	1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6 6.Be3 Bg7 7.Be2 Nc6 8.O-O O-O 9.Nb3 a5
D28	Alekhine System, Classical Defense, QGA; D28	1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.e3 e6 5.Bxc4 c5 6.O-O a6 7.Qe2
D20	Alekhine System, QGA	1.d4 d5 2.c4 dxc4 3.e4 Nf6
B05	Alekhine Variation, Alekhine	1.e4 Nf6 2.e5 Nd5 3.d4 d6 4.Nf3 Bg4 5.c4
E03	Alekhine Variation, Catalan	1.d4 Nf6 2.c4 e6 3.g3 d5 4.Bg2 dxc4 5.Qa4+ Nbd7 6.Qxc4 a6 7.Qc2
D06	Alekhine Variation, Chigorin Defense	1.d4 d5 2.c4 Nc6 3.Nf3 Bg4 4.Qa4
A92	Alekhine Variation, Dutch	1.d4 f5 2.c4 Nf6 3.g3 e6 4.Bg2 Be7 5.Nf3 O-O 6.O-O Ne4
D21	Alekhine Variation, QGA	1.d4 d5 2.c4 dxc4 3.Nf3 a6
D22	Alekhine Variation, QGA	1.d4 d5 2.c4 dxc4 3.Nf3 a6 4.e3 Bg4
D67	Alekhine Variation, QGD	1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 O-O 6.Nf3 Nbd7 7.Rc1 c6 8.Bd3 dxc4 9.Bxc4 Nd5 10.Bxe7 Qxe7 11.Ne4
D51	Alekhine Variation, QGD	1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Nbd7 5.Nf3 c6 6.e4
D38	Alekhine Variation, QGD	1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 Bb4 5.Qa4
B70	Alekhine Variation, Sicilian	1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6 6.Be2 Bg7 7.O-O O-O 8.Nb3
D15	Alekhine Variation, Slav	1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 dxc4 5.e3
D15	Alekhine Variation, Slav	1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 dxc4 5.e3 b5 6.a4 b4
C27	Alekhine Variation, Vienna	1.e4 e5 2.Nc3 Nf6 3.Bc4 Nxe4 4.Qh5 Nd6 5.Bb3 Be7 6.Nf3 Nc6 7.Nxe5
B02	Alekhine's Defense; B02	1.e4 Nf6
C68	Alekhjne Variation, Ruy Lopez Exchange	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Bxc6 dxc6 5.d4 exd4 6.Qxd4 Qxd4 7.Nxd4 Bd6
B00	Alekseev Variation, Nimzovich; Heinola-Deppe Gambit	1.e4 Nc6 2.d4 d5 3.Nc3 e5
A00	Alessi Gambit, Grob	1.g4 f5
C53	Alexandre Gambit, Italian	1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.c3 f5
C39	Allgaier; Cotter Cambit, KGA	1.e4 e5 2.f4 exf4 3.Nf3 g5 4.h4 g4 5.Ng5
B27	Althouse; Stiletto Variation, Sicilian	1.e4 c5 2.Nf3 Qa5
A00	Alua Variation	1.e3 e5 2.Nc3 Nc6 3.f4 exf4 4.Nf3
A00	Amar; Paris Opening	1.Nh3
D00	Amazon Attack	1.d4 d5 2.Qd3
A00	Amazon, Dunst	1.Nc3 d5 2.e4 dxe4 3.Nxe4 Qd5
B45	American Attack, Sicilian	1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nc6 5.Nc3 Nf6 6.Ndb5 Bb4 7.Nd6+
A82	American Gambit, Dutch	1.d4 f5 2.e4 fxe4 3.Nd2
A06	Ampel Variation, Reti	1.Nf3 d5 2.Rg1
B72	Amsterdam (Battery) Variation, Sicilian	1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6 6.Be3 Bg7 7.Be2 Nc6 8.Qd2
A00	Amsterdam Attack	1.e3 e5 2.c4 d6 3.Nc3 Nc6 4.b3 Nf6
B93	Amsterdam Variation, Sicilian; B93	1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.f4
D12	Amsterdam Variation, Slav	1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.e3 Bf5 5.cxd5 cxd5 6.Nc3
C14	Anderssen (Richter) Attack, French	1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bg5 Be7 5.Bxf6
C37	Anderssen Counter-Attack, KGA	1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Bc4 g4 5.Ne5 Qh4+ 6.Kf1 Nh6 7.d4 d6
C33	Anderssen Defense, KGA	1.e4 e5 2.f4 exf4 3.Bc4 g5
C39	Anderssen Defense, Kieseritsky Gambit, KGA	1.e4 e5 2.f4 exf4 3.Nf3 g5 4.h4 g4 5.Ne5 Nf6 6.Bc4 d5 7.exd5 Bd6
C25	Anderssen Defense, Vienna	1.e4 e5 2.Nc3 Bc5
C23	Anderssen Gambit	1.e4 e5 2.Bc4 b5 3.Bxb5 c6
B01	Anderssen Variation, Center Counter	1.e4 d5 2.exd5 Qxd5 3.Nc3 Qa5 4.d4 e5
C51	Anderssen Variation, Evans	1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.b4 Bxb4 5.c3 Be7
C77	Anderssen Variation, Ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.d3
C65	Anderssen Variation, Ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 Nf6 4.d3 d6 5.Bxc6+
B41	Anderssen; Counterattack Var, Sic	1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nf6
C39	Anderssen-Cordel Gambit, KGA	1.e4 e5 2.f4 exf4 3.Nf3 g5 4.h4 g4 5.Ne5 Nf6 6.Bc4 d5 7.exd5 Bd6 8.d4 Nh5 9.Bxf4 Nxf4
A00	Anderssen's Opening	1.a3
A00	Andersspike	1.a3 g6 2.g4
B20	Andreaschek Gambit, Sicilian	1.e4 c5 2.d4 cxd4 3.Nf3 e5 4.c3
A10	Anglo Scandanavian Defense, English	1.c4 d5
A15	Anglo System, English; A15	1.c4 Nf6
A21	Anglo-Dutch	1.c4 e5 2.Nc3 f5
A10	Anglo-Dutch Defense	1.c4 f5
A10	Anglo-Lithuanian Variation, English	1.c4 Nc6
A10	Anglo-Polish Dutch	1.c4 f5 2.b4
A41	Anglo-Slav Opening	1.d4 c6 2.c4 d6
A11	Anglo-Slav, English; A11	1.c4 c6
A16	Anti-anti-grunfeld	1.c4 Nf6 2.Nc3 g6 3.Nf3 Bg7 4.e4
A31	Anti-Benoni Variation, Symmetrical English; A31	1.c4 c5 2.Nf3 Nf6 3.d4
A80	Anti-Classical Line, Dutch	1.d4 f5 2.Qd3 e6 3.g4
B90	Anti-English, Najdorf Sicilian	1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Be3 Ng4
D70	Anti-Grunfeld Variation	1.d4 Nf6 2.c4 g6 3.d5
A80	Anti-Leningrad Variation, Dutch	1.d4 f5 2.Qd3 g6 3.g4
C88	Anti-Marshall Variation, Ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 O-O 8.a4
D43	Anti-Meran Gambit, QGD	1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.Bg5
B06	Anti-Modern	1.e4 g6 2.d4 Bg7 3.Nc3 d6 4.Bc4 c6 5.Qe2
A80	Anti-Modern, Dutch	1.d4 f5 2.Qd3 d6 3.g4
D44	Anti-Moscow Gambit	1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.Bg5 h6 6.Bh4
E10	Anti-Nimzo-Indian; E10	1.d4 Nf6 2.c4 e6 3.Nf3
D30	Anti-Noteboom Gambit, Semi-Slav	1.d4 d5 2.c4 e6 3.Nf3 c6 4.Nc3 dxc4 5.g3
D31	Anti-Noteboom Variation, Semi-Slav	1.d4 d5 2.c4 e6 3.Nc3 c6 4.Nf3 dxc4 5.Bg5
B07	Anti-Philidor	1.e4 d6 2.d4 Nf6 3.Nc3 Nbd7 4.f4
A00	Anti-Pirc Variation, Dunst; Myers Attack	1.Nc3 g6 2.h4
E17	Anti-Queen's Indian System	1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3 Bb7 5.Bg2 Be7 6.Nc3
B57	Anti-Sozin Variation, Sicilian	1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Bc4 Qb6
A80	Anti-Stonewall, Dutch	1.d4 f5 2.Qd3 d5 3.g4
D55	Anti-Tartakower Variation, QGD	1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 O-O 6.Nf3 h6 7.Bxf6
D02	Anti-Torre	1.d4 d5 2.Nf3 Bg4 3.Ne5 Bf5 4.g4
D02	Anti-Torre, QP	1.d4 d5 2.Nf3 Bg4
D00	Anti-Veresov	1.d4 d5 2.Nc3 Bg4
D10	Anti-Winawer Gambit, Slav	1.d4 d5 2.c4 c6 3.Nc3 e5 4.e4
A81	Antoshin-Hort Variation, Dutch	1.d4 f5 2.g3 Nf6 3.Bg2 d6
A45	Arafat Gambit	1.d4 Nf6 2.e4 Nxe4 3.Bd3 Nf6 4.Bg5
B98	Argenitne; Goteborg Var, Sicilian	1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Bg5 e6 7.f4 Be7 8.Qf3 h6 9.Bh4 g5
A75	Argentine Attack, Benoni; A75	1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.e4 g6 7.Nf3 Bg7 8.Be2 O-O 9.O-O a6 10.a4 Bg4
D52	Argentine Variation, QGD	1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Nbd7 5.e3 c6 6.Nf3 Qa5 7.Nd2 Bb4 8.Qc2 O-O 9.Bh4
D31	Argentinian Gambit, QGD	1.d4 d5 2.c4 Bf5 3.cxd5 Bxb1 4.Qa4+ c6 5.dxc6 Nxc6 6.Rxb1 Qxd4
C78	Arkangelsk; Counterthrust Var, Ruy	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O b5
C18	Armenian Line, French	1.e4 e6 2.d4 d5 3.Nc3 Bb4 4.e5 c5 5.a3 Ba5 6.b4 cxd4
B28	Aronin System, Sicilian	1.e4 c5 2.Nf3 a6 3.Be2
E97	Aronin-Taimanov Variation, KID; E97	1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 O-O 6.Be2 e5 7.O-O Nc6
C95	Arseniev Variation, Ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 d6 8.c3 O-O 9.h3 Nb8 10.d4 Nbd7 11.c4
A34	Asymmetrical Variation, English	1.c4 c5 2.Nc3 Nf6 3.Nf3 d5 4.cxd5 Nxd5
B01	Atkinson (Kloosterboer) Variation, Center Counter	1.e4 d5 2.exd5 c6 3.dxc6 e5
C37	Australian Gambit, KGA	1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Bc4 g4 5.h4
B09	Austrian Attack, Pirc; B09	1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.f4
D06	Austrian Defense; Summetrical Defense, QGD	1.d4 d5 2.c4 c5
B09	Austrian; Yugoslav Defense, Pirc	1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.f4 Bg7 5.Nf3
E30	Averbakh Gambit, Nimzo-Indian	1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Bg5 h6 5.Bh4 c5 6.d5 b5
E73	Averbakh Variation, KID	1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Be2 O-O 6.Bg5
A41	Averbakh Variation, Modern	1.d4 g6 2.c4 Bg7 3.Nc3 d6 4.e4
E14	Averbakh Variation, QID	1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.e3 Bb7 5.Bd3 c5 6.O-O Be7 7.b3 O-O 8.Bb2 cxd4 9.Nxd4
C87	Averbakh Variation, Ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 d6
B03	B03	1.e4 Nf6 2.e5 Nd5 3.d4
B04	B04	1.e4 Nf6 2.e5 Nd5 3.d4 d6 4.Nf3
B05	B05	1.e4 Nf6 2.e5 Nd5 3.d4 d6 4.Nf3 Bg4
B07	B07	1.e4 d6
B08	B08	1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.Nf3
B11	B11	1.e4 c6 2.Nc3
B12	B12	1.e4 c6 2.d4
B14	B14	1.e4 c6 2.d4 d5 3.exd5 cxd5 4.c4 Nf6 5.Nc3
B15	B15	1.e4 c6 2.d4 d5 3.Nc3
B19	B19	1.e4 c6 2.d4 d5 3.Nc3 dxe4 4.Nxe4 Bf5 5.Ng3 Bg6 6.h4 h6 7.Nf3
B25	B25	1.e4 c5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.d3 d6
B26	B26	1.e4 c5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.d3 d6 6.Be3
B27	B27	1.e4 c5 2.Nf3
B31	B31	1.e4 c5 2.Nf3 Nc6 3.Bb5 g6
B32	B32	1.e4 c5 2.Nf3 Nc6 3.d4
B33	B33	1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 Nf6
B35	B35	1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 g6 5.Nc3 Bg7 6.Be3 Nf6 7.Bc4
B37	B37	1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 g6 5.c4 Bg7
B38	B38	1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 g6 5.c4 Bg7 6.Be3
B41	B41	1.e4 c5 2.Nf3 e6 3.d4
B42	B42	1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 a6 5.Bd3
B43	B43	1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 a6 5.Nc3
B45	B45	1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nc6 5.Nc3
B46	B46	1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nc6 5.Nc3 a6
B48	B48	1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nc6 5.Nc3 Qc7 6.Be3
B49	B49	1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nc6 5.Nc3 Qc7 6.Be3 a6 7.Be2
B53	B53	1.e4 c5 2.Nf3 d6 3.d4
B54	B54	1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4
B55	B55	1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6
B56	B56	1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3
B58	B58	1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Be2
B59	B59	1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Be2 e5 7.Nb3
B61	B61	1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Qd2
B62	B62	1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Bg5 e6
B64	B64	1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Bg5 e6 7.Qd2 Be7 8.O-O-O O-O 9.f4
B65	B65	1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Bg5 e6 7.Qd2 Be7 8.O-O-O O-O 9.f4 Nxd4 10.Qxd4
B66	B66	1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Bg5 e6 7.Qd2 a6
B67	B67	1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Bg5 e6 7.Qd2 a6 8.O-O-O Bd7
B68	B68	1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Bg5 e6 7.Qd2 a6 8.O-O-O Bd7 9.f4 Be7
B69	B69	1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Bg5 e6 7.Qd2 a6 8.O-O-O Bd7 9.f4 Be7 10.Nf3 b5 11.Bxf6
B72	B72	1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6 6.Be3
B73	B73	1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6 6.Be3 Bg7 7.Be2 Nc6 8.O-O
B74	B74	1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6 6.Be3 Bg7 7.Be2 Nc6 8.O-O O-O 9.Nb3
B75	B75	1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6 6.Be3 Bg7 7.f3
B77	B77	1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6 6.Be3 Bg7 7.f3 O-O 8.Qd2 Nc6 9.Bc4
B78	B78	1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6 6.Be3 Bg7 7.f3 O-O 8.Qd2 Nc6 9.Bc4 Bd7 10.O-O-O
B79	B79	1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6 6.Be3 Bg7 7.f3 O-O 8.Qd2 Nc6 9.Bc4 Bd7 10.O-O-O Qa5
B85	B85	1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e6 6.Be2 a6 7.O-O Be7
B89	B89	1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e6 6.Bc4 Nc6 7.Be3
B94	B94	1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Bg5
B95	B95	1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Bg5 e6
B96	B96	1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Bg5 e6 7.f4
B98	B98	1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Bg5 e6 7.f4 Be7
B99	B99	1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Bg5 e6 7.f4 Be7 8.Qf3 Qc7 9.O-O-O Nbd7
D17	Baarn Variation, Slav; Bled Attack	1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 dxc4 5.a4 Bf5 6.Nh4
C01	Baeuerle Gambit, French	1.e4 e6 2.d4 b5
C37	Baldwin Gambit, KGA	1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Bc4 g4 5.O-O gxf3 6.Qxf3 Qf6 7.Nc3 Qd4+ 8.Kh1 Qxc4 9.Nd5
C90	Balla Variation, Ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 d6 8.c3 Na5 9.Bc2 c5 10.d4 Qc7
A82	Balogh Defense, Dutch	1.d4 f5 2.e4 d6
B07	Balogh Defense, Pirc	1.e4 d6 2.d4 f5
B03	Balogh Variation, Alekhine	1.e4 Nf6 2.e5 Nd5 3.d4 d6 4.Bc4
A52	Balogh; Tartakower C-G, Budapest	1.d4 Nf6 2.c4 e5 3.dxe5 Ng4 4.e4 d6
D31	Baltic Defense, QGD	1.d4 d5 2.c4 Bf5 3.cxd5 Bxb1 4.Qa4+ c6 5.dxc6 Nxc6
C00	Banzai-Leong Gambit, French	1.e4 e6 2.b4
B28	Barcza Line, Sicilian	1.e4 c5 2.Nf3 a6 3.c3 Nf6
A07	Barcza Opening, Reti; King's Indian Attack; A07	1.Nf3 d5 2.g3
A80	Barcza Variation, Dutch	1.d4 f5 2.Nf3 Nf6 3.c3
C44	Bardeleben Variation, Scotch	1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.c3 dxc3 5.Nxc3 Bb4 6.Bc4 Nf6
C29	Bardeleben Variation, Vienna	1.e4 e5 2.Nc3 Nf6 3.f4 d5 4.fxe5 Nxe4 5.Qf3 f5
C68	Barendregt-Fischer Var, Ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Bxc6 dxc6 5.O-O
B22	Barmen Defense, Sicilian	1.e4 c5 2.c3 d5 3.exd5 Qxd5
A52	Barmina Gambit, Budapest	1.d4 Nf6 2.c4 e5 3.dxe5 Ng4 4.e4 Nxe5 5.f4 Bc5
B00	Barnes Defense	1.e4 f6
A00	Barnes; Gedult-Gunderam; Walkerling	1.f3
C60	Barnes; Smyslov; Fianchetto Var, Ruy	1.e4 e5 2.Nf3 Nc6 3.Bb5 g6
D02	Barry Attack	1.d4 Nf6 2.Nf3 g6 3.Nc3 d5 4.Bf4 Bg7 5.e3 O-O 6.Be2
B00	Basman Defense; Macho Grob	1.e4 g5
C44	Basman Gambit	1.e4 e5 2.Nf3 Nc6 3.Be2 Nf6 4.d4 exd4 5.e5
A00	Basman Gambit, Grob	1.g4 d5 2.Bg2 h5 3.gxh5
C33	Basman Gambit, KGA	1.e4 e5 2.f4 exf4 3.Qe2
A81	Basman Variation, Dutch	1.d4 f5 2.g3 g6 3.Bg2 Bg7 4.Nf3 c6 5.O-O Nh6
B00	Basman; Macho Grob; Borg	1.e4 g5
B50	Basman-Palatnik Gambit	1.e4 c5 2.Nf3 d6 3.c3 Nf6 4.Be2 Nc6 5.d4 cxd4 6.cxd4 Nxe4
C84	Basque Gambit, Ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.d4 exd4 7.e5 Ne4 8.c3
A45	Basque Opening	1.d4 Nf6 2.b3
B47	Bastrikov Variation, Sicilian; B47	1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nc6 5.Nc3 Qc7
A02	Batavo Polish Attack, Bird	1.f4 Nf6 2.Nf3 g6 3.b4
A00	Battambang, Dunst	1.Nc3 e5 2.a3
C20	Bavarian Gambit	1.e4 e5 2.c4 d5
E97	Bayonet Attack, KID	1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 O-O 6.Be2 e5 7.O-O Nc6 8.d5 Ne7 9.b4
B07	Bayonet Attack, Pirc	1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.Be2 Bg7 5.h4
B12	Bayonet Variation, Caro	1.e4 c6 2.d4 d5 3.e5 Bf5 4.g4
C77	Bayreuth Variation, ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.Bxc6
C34	Becker; Anti-Kieseritzky Var, KGA	1.e4 e5 2.f4 exf4 3.Nf3 h6
A10	Beefeater	1.c4 g6 2.Nc3 Bg7 3.d4 c5 4.d5 Bxc3 5.bxc3 f5
A40	Beefeater Variation	1.d4 g6 2.c4 Bg7 3.Nc3 c5 4.d5 Bxc3+ 5.bxc3 f5
D50	Been & Koomen; Dutch & Peruvian	1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 c5
C47	Belgrade Gambit, 4 Knights	1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 4.d4 exd4 5.Nd5
E35	Beliavsky Gambit, Nimzo-Indian	1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Qc2 d5 5.cxd5 exd5 6.Nf3 Qf5 7.Qd1 e5
D31	Beliavsky Line, Semi-Slav	1.d4 d5 2.c4 e6 3.Nc3 c6 4.Nf3 dxc4 5.Bg5 f6
C37	Bello Gambit, KGA	1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Bc4 g4 5.O-O gxf3 6.Qxf3 Qf6 7.Nc3
A84	Bellon Gambit	1.d4 e6 2.c4 f5 3.e4
A84	Bellon Gambit, Dutch	1.d4 f5 2.c4 e6 3.e4
A22	Bellon Gambit, English	1.c4 e5 2.Nc3 Nf6 3.Nf3 e4 4.Ng5 b5
C64	Benelux Variation, Ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 Bc5 4.c3 Nf6 5.d4 Bb6 6.O-O O-O
C44	Benima Defense, Scotch	1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Bc4 Be7
E62	Benjamin Defense, KID	1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.Nf3 d6 5.g3 O-O 6.Bg2 c6 7.O-O Qb6
E99	Benko Attack, KID; E99	1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 O-O 6.Be2 e5 7.O-O Nc6 8.d5 Ne7 9.Ne1 Nd7 10.f3
A57	Benko Gambit Accepted	1.d4 Nf6 2.c4 c5 3.d5 b5 4.cxb5
A57	Benko Gambit Declined; Hjoerring Countergambit	1.d4 Nf6 2.c4 c5 3.d5 b5 4.e4
A57	Benko Gambit; Volga; Opocensky; Vaitonis; A57	1.d4 Nf6 2.c4 c5 3.d5 b5
E99	Benko Variation, KID	1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 O-O 6.Be2 e5 7.O-O Nc6 8.d5 Ne7 9.Ne1 Nd7 10.f3 f5 11.g4
A00	Benko; Barczay; Bilek; Hungarian	1.g3
E74	Benoni Defense, KID; E74	1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Be2 O-O 6.Bg5 c5
E31	Benoni Defense, Nimzo-Indian; E31	1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Bg5 h6 5.Bh4 c5 6.d5 d6
A43	Benoni Gambit Accepted	1.d4 c5 2.dxc5
A09	Benoni Reversed; Wing Blumenfeld; Advance Variation	1.Nf3 d5 2.c4 d4
A43	Benoni-Indian Defense	1.d4 c5 2.d5 Nf6
A43	Benoni-Staunton Gambit	1.d4 c5 2.d5 f5 3.e4
A47	Berg Variation	1.d4 Nf6 2.Nf3 b6 3.g3 Bb7 4.Bg2 c5 5.c4 cxd4 6.Qxd4
C63	Berger (Dyckhoff) Variation, Ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 f5 4.Nc3
C22	Berger Variation, Center	1.e4 e5 2.d4 exd4 3.Qxd4 Nc6 4.Qe3 Nf6
C42	Berger Variation, Petroff	1.e4 e5 2.Nf3 Nf6 3.Nxe5 d6 4.Nf3 Nxe4 5.d4 d5 6.Bd3 Be7 7.O-O Nc6 8.Re1 Bg4 9.c3 f5 10.Nbd2
C80	Berger Variation, Ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Nxe4 6.d4 b5 7.Bb3 d5 8.a4 Nxd4 9.Nxd4 exd4 10.Nc3
C24	Berlin Defense, Bishop; C24	1.e4 e5 2.Bc4 Nf6
C39	Berlin Defense, KGA	1.e4 e5 2.f4 exf4 3.Nf3 g5 4.h4 g4 5.Ne5 Nf6
C65	Berlin Defense, Ruy Lopez; C65	1.e4 e5 2.Nf3 Nc6 3.Bb5 Nf6
A00	Berlin Gambit, Dunst	1.Nc3 Nc6 2.d4 d5 3.e4 dxe4 4.d5
E38	Berlin Variation, Nimzo-Indian; E38	1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Qc2 c5
C82	Berlin Variation, Ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Nxe4 6.d4 b5 7.Bb3 d5 8.dxe5 Be6 9.c3 Nc5
C67	Berlin; Rio de Janerio Var, Ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 Nf6 4.O-O Nxe4 5.d4 Be7 6.Qe2 Nd6 7.Bxc6+ bxc6 8.dxe5 Nb7 9.Nc3 O-O 10.Re1
C57	Berliner Variation, 2 Knights	1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.Ng5 d5 5.exd5 Nd4 6.c3 b5 7.Bf1 Nxd5 8.Ne4 Qh4
E53	Bernstein Defense; Gligoric System; E53	1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Nf3 d5 6.Bd3 c5
C49	Bernstein Variation, 4 Knights	1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 4.Bb5 Bb4 5.O-O O-O 6.d3 d6 7.Bg5 Bxc3 8.bxc3 Ne7
C12	Bernstein Variation, French	1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bg5 Bb4 5.e5 h6 6.Bh4
E56	Bernstein Variation, Nimzo-Indian; E56	1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Nf3 d5 6.Bd3 c5 7.O-O Nc6
D57	Bernstein Variation, QGD	1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 O-O 6.Nf3 h6 7.Bh4 Ne4 8.Bxe7 Qxe7 9.cxd5 Nxc3 10.bxc3
C80	Bernstein Variation, Ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Nxe4 6.d4 b5 7.Bb3 d5 8.dxe5 Be6 9.Nbd2
C35	Bertin; Three Pawns Gambit, KGA	1.e4 e5 2.f4 exf4 3.Nf3 Be7 4.Bc4 Bh4+ 5.g3
D01	Betbeder; Veresov; Levitzky; Parisian	1.d4 d5 2.c4 dxc4 3.e4 f5
C65	Beverwijk Variation, Ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 Nf6 4.O-O Bc5
C21	Beyer Gambit	1.e4 e5 2.d4 d5
B20	Big Clamp Variation, Sicilian	1.e4 c5 2.d3 Nc6 3.c3 d6 4.f4
B00	Bileefelder Gambit, Nimzovich Defense	1.e4 Nc6 2.d4 e5 3.dxe5 Bc5
C40	Bilguer Variation, Latvian	1.e4 e5 2.Nf3 f5 3.Nxe5 Qf6 4.d4 d6 5.Nc4
C33	Bilguer-Mirage Variation, KGA	1.e4 e5 2.f4 exf4 3.Qe2
D20	Billinger Gambit, QGA	1.d4 d5 2.c4 dxc4 3.e3 e5 4.Bc4 exd4 5.Qb3 Qe7 6.a3
A00	Billockus-Johansen Gambit, Dunst	1.Nc3 e5 2.Nf3 Bc5
C54	Bird Attack, Italian	1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.c3 Nf6 5.b4
C61	Bird Defense, Ruy Lopez; C61	1.e4 e5 2.Nf3 Nc6 3.Bb5 Nd4
C37	Bird Gambit, KGA	1.e4 e5 2.f4 exf4 3.Nf3 g5 4.d4 Bg4 5.Ne5 Qh4+ 6.g3
C41	Bird Gambit, Philidor	1.e4 e5 2.Nf3 d6 3.d4 exd4 4.c3
C00	Bird Invitation, French	1.e4 e6 2.Bb5
B33	Bird Variation, Siclian	1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e5 6.Ndb5 d6 7.Bg5 a6 8.Na3 Be6
A02	Bird's Opening; Dutch Attack	1.f4
A00	Birmingham Gambit, Polish	1.b4 c5
B06	Bishop Attack	1.e4 g6 2.d4 Bg7 3.Bc4
A57	Bishop Attack, Benko Gambit	1.d4 Nf6 2.c4 c5 3.d5 b5 4.Bg5
E47	Bishop Attack, Nimzo-Indian; E47	1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Bd3
D30	Bishop Attack, Tarrasch	1.d4 d5 2.c4 e6 3.Nf3 c5 4.cxd5 exd5 5.Bg5
D00	Bishop Attack; Levitsky Attack, Queen Pawn Game	1.d4 d5 2.Bg5
D04	Bishop Defense, QP; Anti-Colle	1.d4 d5 2.Nf3 Nf6 3.e3 Bf5
C27	Bishop Variation, Vienna	1.e4 e5 2.Nc3 Nf6 3.Bc4 Bc5
C33	Bishop's Gambit, KGA	1.e4 e5 2.f4 exf4 3.Bc4
C23	Bishop's Opening; C23	1.e4 e5 2.Bc4
C37	Blachy Gambit, KGA	1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Bc4 Nc6
C31	Blackbunre Attack, KGD	1.e4 e5 2.f4 d5 3.Nf3
B01	Blackbunre-Kloosterboer Gambit, Center Counter	1.e4 d5 2.exd5 c6 3.dxc6 e5
C49	Blackburne Attack, 4 Knights	1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 4.Bb5 Bb4 5.O-O O-O 6.Nd5 Bc5 7.d4
A91	Blackburne Attack, Dutch	1.d4 f5 2.c4 Nf6 3.g3 e6 4.Bg2 Bg7 5.Nh3
C45	Blackburne Attack, Scotch	1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Nxd4 Bc5 5.Be3 Qf6 6.c3 Nge7 7.Qd2
C10	Blackburne Defense, French	1.e4 e6 2.d4 d5 3.Nc3 dxe4 4.Nxe4 Nd7
B01	Blackburne Gambit, Center Counter	1.e4 d5 2.exd5 c6 3.dxc6 Nxc6
A81	Blackburne Variation, Dutch	1.d4 f5 2.g3 Nf6 3.Bg2 e6 4.Nh3
D21	Blackburne's Move, QGA; Normal Variation, QGA; D21	1.d4 d5 2.c4 dxc4 3.Nf3
D00	Blackmar Gambit; Gedult Gambit	1.d4 d5 2.e4 dxe4 3.f3
D00	Blackmar-Diemer Gambit	1.d4 d5 2.e4
D00	Blackmar-Diemer Gambit	1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3
A45	Blackmar-Diemer Gambit Deferred	1.d4 Nf6 2.f3 d5 3.e4
A80	Blackmar's Second Gambit, Dutch	1.d4 f5 2.e4 fxe4 3.Nc3 Nf6 4.f3
A85	Bladel Variation, Dutch	1.d4 f5 2.c4 g6 3.Nc3 Nh6
C23	Blanel Gambit, Bishop	1.e4 e5 2.Bc4 Nf6 3.Nc3 Nxe4
A12	Bled Variation, English	1.c4 c6 2.Nf3 d5 3.b3 Nf6 4.g3 g6
C33	Bledow Countergambit, KGA	1.e4 e5 2.f4 exf4 3.Bc4 d5 4.Bxd5 Nf6
C33	Bledow; Morphy Defense, KGA	1.e4 e5 2.f4 exf4 3.Bc4 d5
A44	Blockade Variation; Semi-Benoni; Russian Variation	1.d4 c5 2.d5 e5 3.e4 d6
A06	Bloodgood Gambit, Reti	1.Nf3 d5 2.b3 c5 3.e4 dxe4 4.Ne5
E10	Blumenfeld Countergambit	1.d4 Nf6 2.c4 e6 3.Nf3 c5 4.d5 b5
E10	Blumenfeld Countergambit Accepted	1.d4 Nf6 2.c4 e6 3.Nf3 c5 4.d5 b5 5.dxe6 fxe6 6.cxb5 d5
A09	Blumenfeld Gambit, Reti	1.Nf3 d5 2.c4 d4 3.e3 c5 4.b4
E10	Blumenfeld Variation	1.d4 Nf6 2.c4 e6 3.Nf3 c5
D49	Blumenfeld Variation, QGD; D49	1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.e3 Nbd7 6.Bd3 dxc4 7.Bxc4 b5 8.Bd3 a6 9.e4 c5 10.e5 cxd4 11.Nxb5
C45	Blumenfeld Variation, Scotch	1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Nxd4 Bc5 5.Be3 Qf6 6.Nb5
E81	Bobotsov-Korchnoi-Petrosian Variation, KID	1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f3 O-O 6.Nge2
C33	Boden Variation, KGA	1.e4 e5 2.f4 exf4 3.Bc4 Qh4+ 4.Kf1 Nc6
C41	Boden Variation, Philidor	1.e4 e5 2.Nf3 d6 3.d4 exd4 4.Qxd4 Bd7
C64	Boden Variation, Ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 Bc5 4.c3 Qe7
C42	Boden-Kieseritzky Gambit, Petroff	1.e4 e5 2.Nf3 Nf6 3.Bc4 Nxe4 4.Nc3
C27	Boden-Kieseritzky Gambit, Vienna	1.e4 e5 2.Nc3 Nf6 3.Bc4 Nxe4 4.Nf3
B01	Boehnke Gambit Accepted, Center Counter	1.e4 d5 2.exd5 e5 3.dxe6 Bxe6
B01	Boehnke Gambit, Center Counter	1.e4 d5 2.exd5 e5
D52	Bogoljubov Variation, QGD	1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Nbd7 5.e3 c6 6.Nf3 Qa5 7.Nd2 Bb4 8.Qc2
C33	Bogoljubov; Jaenisch Variation, KGA	1.e4 e5 2.f4 exf4 3.Bc4 Nf6 4.Nc3 c6
A40	Bogoljubov; Mikenas-Van Geet Defense	1.d4 Nc6
C47	Bogoljubow (Scotch) Variation, 4 Knights	1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 4.d4
D24	Bogoljubow Defense, QGA	1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.Nc3 a6 5.e4
E11	Bogoljubow Defense; Bogo-Indian Defense; E11	1.d4 Nf6 2.c4 e6 3.Nf3 Bb4+
D00	Bogoljubow Variation, BDG	1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 exf3 5.Nxf3 g6
C17	Bogoljubow Variation, French	1.e4 e6 2.d4 d5 3.Nc3 Bb4 4.e5 c5 5.Bd2
C33	Bogoljubow Variation, KGA	1.e4 e5 2.f4 exf4 3.Bc4 Nf6 4.Nc3
B00	Bogoljubow Variation, Nizovich Defense	1.e4 Nc6 2.d4 d5 3.Nc3
D46	Bogoljubow Variation, QGD	1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.e3 Nbd7 6.Bd3 Be7
A09	Bogoljubow Variation, Reti	1.Nf3 d5 2.c4 c6 3.b3
D34	Bogoljubow Variation, Tarrasch	1.d4 d5 2.c4 e6 3.Nc3 c5 4.cxd5 exd5 5.Nf3 Nc6 6.g3 Nf6 7.Bg2 Be7 8.O-O O-O 9.Bg5 Be6 10.Rc1 c4
C58	Bogoljubow Variation, Two Knights	1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.Ng5 d5 5.exd5 Na5 6.Bb5+ c6 7.dxc6 bxc6 8.Qf3
C91	Bogoljubow; Counterthrust Var, Ruy	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 d6 8.c3 O-O 9.d4 Bg4
C11	Boleslavsky Variation, French	1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.e5 Nfd7 5.f4 c5 6.Nf3 Nc6 7.Be3
B58	Boleslavsky Variation, Sicilian	1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Be2 e5
D11	Bonet Gambit, Slav	1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Bg5
C34	Bonsch-Osmolovsky Variation, KGA	1.e4 e5 2.f4 exf4 3.Nf3 Ne7
A51	Bonsdorf Variation, Budapest	1.d4 Nf6 2.c4 e5 3.dxe5 Ne4 4.a3 b6
B00	Borg Defense; Troon Gambit	1.e4 g5 2.d4 h6 3.h4 g4
A40	Borg Gambit	1.d4 g5
B00	Borg Gambit	1.e4 g5 2.d4 Bg7
A45	Borg Variation, Trompowsky	1.d4 Nf6 2.Bg5 Ne4 3.Bf4 g5
C96	Borisenko Variation, Ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 d6 8.c3 O-O 9.h3 Na5 10.Bc2 c5 11.d4 Nc6
C95	Borisenko Variation, Ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 d6 8.c3 O-O 9.h3 Nb8 10.d4 Nbd7
D22	Borisenko-Furman Variation, QGA	1.d4 d5 2.c4 dxc4 3.Nf3 a6 4.e4
B25	Botvinnik Defense, Sicilian Closed	1.e4 c5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.d3 d6 6.f4 e5
A28	Botvinnik Line, English	1.c4 e5 2.Nc3 Nc6 3.Nf3 Nf6 4.e4
A36	Botvinnik System Reversed, Symmetrical English	1.c4 c5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.e3 e5
A25	Botvinnik System, King's English	1.c4 e5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.d3 d6 6.e4
E49	Botvinnik System, Nimzo-Indian; E49	1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Bd3 d5 6.a3 Bxc3+ 7.bxc3
E07	Botvinnik Variation, Catalan	1.d4 Nf6 2.c4 e6 3.g3 d5 4.Bg2 Be7 5.Nf3 O-O 6.O-O Nbd7 7.Nc3 c6 8.Qd3
A93	Botvinnik Variation, Dutch; A93	1.d4 f5 2.c4 Nf6 3.g3 e6 4.Bg2 Be7 5.Nf3 O-O 6.O-O d5 7.b3
A25	Botvinnik Variation, English	1.c4 e5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.e4
C06	Botvinnik Variation, French	1.e4 e6 2.d4 d5 3.Nd2 Nc6 4.e4 Nfd7 5.Bd3 c5 6.c3 b6
D83	Botvinnik Variation, Grunfeld	1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Bf4 Bg7 5.e3 O-O 6.Rc1 c5 7.dxc5 Be6
D80	Botvinnik Variation, Grunfeld	1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.e3 Bg7 5.Nf3 O-O 6.Qb3 e6
E24	Botvinnik Variation, Nimzo-Indian	1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.a3 Bxc3+ 5.bxc3 c5 6.f3 d5 7.e3 O-O 8.cxd5 Nxd5
E36	Botvinnik Variation, Nimzo-Indian	1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Qc2 d5 5.a3 Bxc3+ 6.Qxc3 Nc6
D60	Botvinnik Variation, QGD	1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 O-O 6.Nf3 Nbd7 7.Bd3
D44	Botvinnik Variation, QGD	1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.Bg5 dxc4 6.e4 b5
E12	Botvinnik Variation, QID	1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.Nc3 Bb7 5.Bg5 h6 6.Bh4 g5 7.Bg3 Nh5
A36	Botvinnik Variation, Symmetrical English	1.c4 c5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.e4
A91	Botvinnik-Bronstein Variation, Dutch	1.d4 f5 2.c4 Nf6 3.g3 e6 4.Bg2 Be7 5.Nc3 O-O 6.e3
B12	Botvinnik-Carls Defense, Caro-Kann	1.e4 c6 2.d4 d5 3.e5 c5
A00	Bouncing Bishop Variation	1.e3 e5 2.Bc4 b5 3.Bb3
C00	Bourdonnais (La Bourdonnais) Variation, French	1.e4 e6 2.f4
B32	Bourdonnais; Lowenthal Var, Sic	1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 e5
B20	Bowlder Attack, Sicilian	1.e4 c5 2.Bc4
D01	Boyce Defense, Veresov	1.d4 d5 2.Nc3 Nf6 3.Bg5 Ne4
C11	Bradford Attack, French	1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.e5 Nfd7 5.f4 c5 6.dxc5 Bxc5 7.Qg4
A28	Bradley Beach Variation, English	1.c4 e5 2.Nc3 Nc6 3.Nf3 Nf6 4.d4 e4
B00	Brandics Gambit, Nimzovich Defense	1.e4 Nc6 2.d4 d5 3.Nc3 a6
C45	Braune Variation, Scotch	1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Nxd4 Qh4 5.Be3
A22	Bremen; Carls Variation, English	1.c4 e5 2.Nc3 Nf6 3.g3
A25	Bremen-Hort Variation, English	1.c4 e5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.e3 d6 6.Nge2 Be6
C37	Brentano Defense, KGA	1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Bc4 g4 5.O-O d5
C60	Brentano Defense, Ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 g5
C83	Breslau Variation, Ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Nxe4 6.d4 b5 7.Bb3 d5 8.dxe5 Be6 9.c3 Be7 10.Re1 O-O 11.Nd4
B00	Breyer Defense, Nimzovich	1.e4 Nc6 2.Nc3 Nf6
C44	Breyer Opening, Ponziani	1.e4 e5 2.Nf3 Nc6 3.c3 Nf6 4.d3 Be7 5.b4
B10	Breyer Variation, Caro-Kann	1.e4 c6 2.d3
C14	Breyer Variation, French	1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bg5 Be7 5.e5 Nfd7 6.h4 c5
D03	Breyer Variation, QP	1.d4 d5 2.Nf3 Nf6 3.Bg5 e6 4.e3 c5 5.c3 Qb6
B39	Breyer Variation, Sicilian; B39	1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 g6 5.c4 Bg7 6.Be3 Nf6 7.Nc3 Ng4
D11	Breyer Variation, Slav	1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nbd2
C29	Breyer Variation, Vienna	1.e4 e5 2.Nc3 Nf6 3.f4 d5 4.fxe5 Nxe4 5.Nf3 Be7
C33	Breyer; Hungarian; Carrera, KGA	1.e4 e5 2.f4 exf4 3.Qf3
C94	Breyer; Retreat Variation, Ruy Lopez; C94	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 d6 8.c3 O-O 9.h3 Nb8
B20	Brick Variation, Sicilian	1.e4 c5 2.Nh3
D06	Brieger Defense; Sahovic Defense, QGD; Baltic Defense	1.d4 d5 2.c4 Bf5
D82	Brinckmann Attack, Grunfeld; D82	1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Bf4
A00	Brinckmann Variation, Polish	1.b4 e5 2.Bb2 f6 3.e4 Bxb4 4.Bc4 Nc6 5.f4 Qe7 6.f5 g6
C79	Brix Variation, Ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O g6
C11	Brodsky-Jones Variation, French	1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.e5 Nfd7 5.f4 c5 6.dxc5 Nc6 7.a3 Bxc5 8.Qg4 O-O 9.Nf3 f6
D00	Brombacher; Daberitz Var, BDG	1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 c5
B52	Bronstein (Haag) Gambit, Sicilian	1.e4 c5 2.Nf3 d6 3.Bb5+ Bd7 4.Bxd7+ Qxd7 5.O-O Nc6 6.c3 Nf6 7.d4
C40	Bronstein Attack, Latvian	1.e4 e5 2.Nf3 f5 3.Nxe5 Qf6 4.d4 d6 5.Nc4 fxe4 6.Be2
E87	Bronstein Defense, KID	1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f3 O-O 6.Be3 e5 7.d5 Nh5 8.Qd2 Qh4+ 9.g3 Nxg3 10.Qf2 Nxf1
A45	Bronstein Gambit	1.d4 Nf6 2.g4
C40	Bronstein Gambit, Latvian	1.e4 e5 2.Nf3 f5 3.Nxe5 Qf6 4.d4 d6 5.Nc4 fxe4 6.Qh5+ g6 7.Qe2
C23	Bronstein Gambit, Vienna	1.e4 e5 2.Nc3 Nc6 3.Bc4 Nf6 4.f4 Nxe4 5.Nf3
E60	Bronstein Variation	1.d4 Nf6 2.c4 g6 3.g3 Bg7 4.Bg2 d6 5.Nf3 O-O 6.Nc3 c6 7.O-O Qa5
B12	Bronstein Variation, Caro-Kann	1.e4 c6 2.d4 d5 3.e5 Bf5 4.Ne2
B01	Bronstein Variation, Center Counter	1.e4 d5 2.exd5 Qxd5 3.Nc3 Qd6 4.d4 Nf6 5.Nf3 a6
E80	Bronstein Variation, KID	1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f3 e5 6.d5 Nh5 7.Be3 Na6 8.Qd2 Qh4+ 9.g3 Nxg3 10.Qf2 Nxf1 11.Qxh4 Nxe3 12.Kf2 Nxc4
E48	Bronstein Variation, Nimzo-Indian	1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Bd3 d5 6.Nf3 c5 7.O-O dxc4 8.Bxc4 Bd7
E48	Bronstein Variation, Nimzo-Indian	1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Bd3 d5 6.Nf3 c5 7.O-O dxc4 8.Bxc4 Nbd7 9.Ne2
E45	Bronstein Variation, Nimzo-Indian; E45; Byrne Variation	1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 b6 5.Ne2 Ba6
E55	Bronstein Variation, Nimzo-Indian; E55	1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Nf3 d5 6.Bd3 c5 7.O-O dxc4 8.Bxc4 Nbd7
C69	Bronstein Variation, Ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Bxc6 dxc6 5.O-O Qd6
B41	Bronstein Variation, Sicilian	1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 a6 5.c4 Nf6 6.Nc3 Bb4 7.Bd3 Nc6
C42	Browne Attack, Petroff	1.e4 e5 2.Nf3 Nf6 3.Nxe5 d6 4.Nf3 Nxe4 5.d4 d5 6.Bd3 Be7 7.O-O Nc6 8.c4 Nb4 9.cxd5
B98	Browne Variation, Najdorf Sicilian	1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Bg5 e6 7.f4 Be7 8.Qf3 h6 9.Bh4 Qc7
B27	Brussels Gambit, Sicilian	1.e4 c5 2.Nf3 f5
C33	Bryan; Kieseritzky Gambit, KGA	1.e4 e5 2.f4 exf4 3.Bc4 Qh4+ 4.Kf1 b5
A00	Bucker Defense, Grob	1.g4 Nh6
A00	Bucker Defense, Polish	1.b4 Na6
B02	Buckley Attack, Alekhine	1.e4 Nf6 2.e5 Nd5 3.Na3
A51	Budapest Defense; A51	1.d4 Nf6 2.c4 e5
B06	Buecker Gambit	1.e4 g6 2.d4 Bg7 3.Bc4 b5
B27	Buecker Variation, Sicilian	1.e4 c5 2.Nf3 h6
E16	Buerger Variation, QID	1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3 Bb7 5.Bg2 c5 6.d5 exd5 7.Ng5
A00	Bugayev Attack, Polish	1.b4 e5 2.a3
C60	Bulgarian Variation, Ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 a5
A45	Bullfrog; Weidenhagen; Krabbe; Ochsenfrosch	1.d4 Nf6 2.g4
B02	Buntin Gambit, Alekhine	1.e4 Nf6 2.e5 Nd5 3.e6
B00	Burgar Gambit, Nimzovich Defense	1.e4 Nc6 2.d4 e5 3.dxe5 d6
E73	Burgess Line, KID	1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Be2 O-O 6.Bg5 Na6 7.Qd2 c6
D94	Burille Variation, Grunfeld; D94	1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.e3
C11	Burn Variation, French	1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bg5 dxe4
E81	Byrne Defense, KID	1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f3 O-O 6.Be3 c6 7.Bd3 a6
B90	Byrne Variation, Sicilian; English Attack	1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Be3
C01	C01	1.e4 e6 2.d4
C04	C04	1.e4 e6 2.d4 d5 3.Nd2 Nc6
C05	C05	1.e4 e6 2.d4 d5 3.Nd2 Nf6
C06	C06	1.e4 e6 2.d4 d5 3.Nd2 Nf6 4.e5 Nfd7 5.Bd3
C08	C08	1.e4 e6 2.d4 d5 3.Nd2 c5 4.exd5 exd5
C09	C09	1.e4 e6 2.d4 d5 3.Nd2 c5 4.exd5 exd5 5.Ngf3 Nc6
C12	C12	1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bg5
C13	C13	1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bg5 dxe4
C14	C14	1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bg5 Be7
C16	C16	1.e4 e6 2.d4 d5 3.Nc3 Bb4 4.e5
C17	C17	1.e4 e6 2.d4 d5 3.Nc3 Bb4 4.e5 c5
C18	C18	1.e4 e6 2.d4 d5 3.Nc3 Bb4 4.e5 c5 5.a3
C19	C19	1.e4 e6 2.d4 d5 3.Nc3 Bb4 4.e5 c5 5.a3 Bxc3+ 6.bxc3 Ne7
C22	C22	1.e4 e5 2.d4 exd4 3.Qxd4
C37	C37	1.e4 e5 2.f4 exf4 3.Nf3 g5
C39	C39	1.e4 e5 2.f4 exf4 3.Nf3 g5 4.h4
C44	C44	1.e4 e5 2.Nf3 Nc6
C45	C45	1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Nxd4
C54	C54	1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.c3 Nf6
C59	C59	1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.Ng5 d5 5.exd5 Na5 6.Bb5+ c6 7.dxc6 bxc6 8.Be2
C72	C72	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 d6 5.O-O
C73	C73	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 d6 5.Bxc6+ bxc6
C74	C74	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 d6 5.c3
C75	C75	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 d6 5.c3 Bd7
C76	C76	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 d6 5.c3 Bd7 6.d4 g6
C77	C77	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6
C82	C82	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Nxe4 6.d4 b5 7.Bb3 d5 8.dxe5 Be6 9.c3
C83	C83	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Nxe4 6.d4 b5 7.Bb3 d5 8.dxe5 Be6 9.c3 Be7
C87	C87	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1
C88	C88	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3
C89	C89	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 O-O 8.c3
C90	C90	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 d6
C92	C92	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 d6 8.c3 O-O 9.h3
C95	C95	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 d6 8.c3 O-O 9.h3 Nb8 10.d4
C96	C96	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 d6 8.c3 O-O 9.h3 Na5
C98	C98	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 d6 8.c3 O-O 9.h3 Na5 10.Bc2 c5 11.d4 Qc7 12.Nbd2 Nc6
C99	C99	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 d6 8.c3 O-O 9.h3 Na5 10.Bc2 c5 11.d4 Qc7 12.Nbd2 cxd4
C23	Calabrese Counter-Gambit	1.e4 e5 2.Bc4 f5
B03	Cambridge Gambit, Alekhine	1.e4 Nf6 2.e5 Nd5 3.d4 d6 4.c4 Nb6 5.f4 g5
D52	Cambridge Springs; Pillsbury Variation, QGD	1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Nbd7 5.e3 c6 6.Nf3 Qa5
C39	Campbell; Brentano; Morphy Var, KGA	1.e4 e5 2.f4 exf4 3.Nf3 g5 4.h4 g4 5.Ne5 d5
B15	Campomanes Attack, Caro	1.e4 c6 2.d4 d5 3.Nc3 Nf6
C01	Canal Attack, French	1.e4 e6 2.d4 d5 3.Nc3 Bb4 4.exd5 exd5 5.Bd3 Ne7 6.Qh5
C50	Canal Variation, Italian	1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.d3 Nf6 5.Nc3 d6 6.Bg5
D50	Canal; Venice Variation, QGD	1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 c5 5.cxd5 Qb6
A45	Canard Attack	1.d4 Nf6 2.f4
A02	Canard Formation; Double Duck	1.f4 f5 2.d4 d5
A40	Cannstatter Variation, Mikenas	1.d4 Nc6 2.c4 e5 3.d5 Nd4
D67	Capablanca Freeing Maneuver, QGD; D67	1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 O-O 6.Nf3 Nbd7 7.Rc1 c6 8.Bd3 dxc4 9.Bxc4 Nd5
C10	Capablanca Line, French	1.e4 e6 2.d4 d5 3.Nc3 dxe4 4.Nxe4 Nd7 5.Nf3 Ngf6 6.Nxf6+ Nxf6 7.Ne5
D83	Capablanca Variation, Grunfeld	1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Bf4 Bg7 5.e3 O-O 6.Rc1
A47	Capablanca Variation, Indian Game; A47	1.d4 Nf6 2.Nf3 b6
E26	Capablanca Variation, Nimzo-Indian	1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.a3 Bxc3+ 5.bxc3 c5 6.e3 Nc6 7.Bd3 O-O 8.Ne2 b6 9.e4 Ne8
E29	Capablanca Variation, Nimzo-Indian	1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.a3 Bxc3+ 5.bxc3 O-O 6.e3 c5 7.Bd3 Nc6 8.Ne2 b6 9.e4 Ne8
D63	Capablanca Variation, QGD	1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 O-O 6.Nf3 Nbd7 7.Rc1 b6 8.cxd5 exd5 9.Bb5
D30	Capablanca Variation, QGD	1.d4 d5 2.c4 e6 3.Nf3 Nf6 4.Bg5 Nbd7 5.e3 c6 6.Nbd2
E16	Capablanca Variation, QID	1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3 Bb7 5.Bg2 Bb4+
A09	Capablanca Variation, Reti	1.Nf3 d5 2.c4 c6 3.b3 Nf6 4.Bb2 Bg4
B14	Carlsbad Line, Caro-Kann	1.e4 c6 2.d4 d5 3.exd5 cxd5 4.c4 Nf6 5.Nc3 Nc6 6.Bg5 e6
A81	Carlsbad Variation, Dutch	1.d4 f5 2.g3 g6 3.Bg2 Bg7 4.Nh3
E62	Carlsbad Variation, KID	1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.Nf3 d6 5.g3 O-O 6.Bg2 Nc6
E23	Carlsbad Variation, Nimzo-Indian	1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Qb3 c5 5.dxc5 Nc6 6.Nf3 Ne4 7.Bd2 Nxd2
D17	Carlsbad Variation, Slav	1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 dxc4 5.a4 Bf5 6.Ne5 Nbd7 7.Nxc4 Qc7 8.g3 e5
D34	Carlsbad Variation, Tarrasch	1.d4 d5 2.c4 e6 3.Nc3 c5 4.cxd5 exd5 5.Nf3 Nc6 6.g3 Nf6 7.Bg2 Be7 8.O-O O-O 9.Bg5
C01	Carlson Gambit, French	1.e4 e6 2.d4 d5 3.Nf3 dxe4 4.Ne5
C44	Caro Variation, Ponziani	1.e4 e5 2.Nf3 Nc6 3.c3 d5 4.Qa4 Bd7
C70	Caro Variation, Ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 b5
B10	Caro-Kann Defense; B10	1.e4 c6
B00	Carr Defense	1.e4 h6
C33	Carrera Gambit, KGA	1.e4 e5 2.f4 exf4 3.Qh5
E00	Catalan Opening	1.d4 Nf6 2.c4 e6 3.g3
C53	Center Attack, Italian	1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.c3 Nf6 5.d4
C43	Center Attack, Petroff	1.e4 e5 2.Nf3 Nf6 3.d4 exd4 4.e5 Ne4 5.Qxd4
C77	Center Attack, Ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.d4 exd4
C84	Center Attack, Ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.d4
B01	Center Counter; Scandanavian; B01	1.e4 d5
B20	Center Formation, Smith-Morra Declined, Sicilian	1.e4 c5 2.d4 cxd4 3.c3 e5
C62	Center Gambit, Ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 d6 4.d4 exd4 5.O-O
C21	Center Game Accepted	1.e4 e5 2.d4 exd4
C21	Center Game; C21	1.e4 e5 2.d4
C53	Center Holding Variation, Italian	1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.c3 Qe7 5.d4 Bb6
A52	Center Play Variation, Budapest; Alekhine Variation	1.d4 Nf6 2.c4 e5 3.dxe5 Ng4 4.e4
D45	Center Variation, Semi-Slav	1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.e3 Nbd7 6.Qc2 Bd6 7.e4
C79	Central Countergambit, Ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O d5
A57	Central Storming Variation, Benko Gambit	1.d4 Nf6 2.c4 c5 3.d5 b5 4.cxb5 a6 5.bxa6 Bxa6 6.Nc3 d6 7.f4
C33	Central; Polerio; Willemson, Steinitz	1.e4 e5 2.f4 exf4 3.d4
A10	Chabanon Gambit, English	1.c4 f5 2.Nf3 d6 3.e4
B23	Chameleon Sicilian	1.e4 c5 2.Nc3 Nc6 3.Nge2
B20	Chameleon Variation, Sicilian	1.e4 c5 2.d3
D15	Chameleon Variation, Slav	1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 a6
D02	Chandler Gambit, QP	1.d4 d5 2.Nf3 c5 3.g3 cxd4 4.Bg2
A40	Charlick Gambit; Englund Gambit	1.d4 e5
C64	Charousek Variation, Ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 Bc5 4.c3 Bb6
C14	Chatard-Alekhine; Albin Attack, Fr	1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bg5 Be7 5.e5 Nfd7 6.h4
B53	Chekhover Variation, Sicilian	1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Qxd4
B33	Chelyabinsk Variation, Sicilian	1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e5 6.Ndb5 d6 7.Bg5 a6 8.Na3 b5
A00	Chenoboskian Variation, Durkin	1.Na3 g6 2.g4
A45	Chepukaitis Gambit	1.d4 Nf6 2.Bg5 c5 3.d5 Qb6 4.Nc3 Qxb2 5.Bd2 Qb6
B20	Chicago Defense, Smith-Morra Accepted, Sicilian	1.e4 c5 2.d4 cxd4 3.c3 dxc3 4.Nxc3 d6 5.Bc4 e6 6.Nf3 Nf6 7.O-O a6
C44	Chicago; Irish; Schulze-Muller Gambit	1.e4 e5 2.Nf3 Nc6 3.Nxe5 Nxe5 4.d4
C21	Chigorin Defense, Danish Gambit	1.e4 e5 2.d4 exd4 3.c3 dxc3 4.Bc4 cxb2 5.Bxb2 Qe7
D07	Chigorin Defense, QGD; D07	1.d4 d5 2.c4 Nc6
C40	Chigorin Gambit, Damiano	1.e4 e5 2.Nf3 f6 3.Nxe5 Qe7 4.Nf3 d5
B08	Chigorin Line, Pirc	1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.Nf3 Bg7 5.Be2 O-O 6.O-O Nc6
A83	Chigorin Variation, Dutch	1.d4 f5 2.e4 fxe4 3.Nc3 Nf6 4.Bg5 c6
C00	Chigorin Variation, French	1.e4 e6 2.Qe2
C12	Chigorin Variation, French	1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bg5 Bb4 5.e5 h6 6.exf6
C42	Chigorin Variation, Petroff	1.e4 e5 2.Nf3 Nf6 3.Nxe5 d6 4.Nf3 Nxe4 5.d4 d5 6.Bd3 Be7 7.O-O Nc6 8.Re1
D46	Chigorin Variation, QGD	1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.e3 Nbd7 6.Bd3 Bd6
D02	Chigorin Variation, QP	1.d4 d5 2.Nf3 Nc6
C97	Chigorin Variation, Ruy Lopez; C97	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 d6 8.c3 O-O 9.h3 Na5 10.Bc2 c5 11.d4 Qc7
D00	Chigorin; Ponziani; Veresov	1.d4 d5 2.Nc3
B07	Chinese Variation, Pirc	1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.Be2 Bg7 5.g4
C40	Chiodini Gambit	1.e4 e5 2.Nf3 Bc5 3.Nxe5 Nc6
C07	Chistiakov Defense, French	1.e4 e6 2.d4 d5 3.Nd2 c5 4.exd5 Qxd5
D20	Christensen Gambit, QGA	1.d4 d5 2.c4 dxc4 3.e3 e5 4.Bc4 exd4 5.Qb3 Qe7 6.Nf3
C40	Clam Gambit, Latvian	1.e4 e5 2.Nf3 f5 3.d3 Nc6 4.exf5
C20	Clam Variation; Leonardis Variation	1.e4 e5 2.d3
A43	Clarendon Court Variation, Benoni	1.d4 c5 2.d5 f5
C42	Classical Attack, Petroff	1.e4 e5 2.Nf3 Nf6 3.Nxe5 d6 4.Nf3 Nxe4 5.d4
C70	Classical Defense Deferred, Ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Bc5
D05	Classical Defense, Colle System; D05	1.d4 d5 2.Nf3 Nf6 3.e3 e6
C21	Classical Defense, Danish Gambit	1.e4 e5 2.d4 exd4 3.c3 dxc3 4.Bc4 cxb2 5.Bxb2 Nf6
C33	Classical Defense, KGA; Lopez Variation	1.e4 e5 2.f4 exf4 3.Bc4 Qh4+ 4.Kf1 g5
C30	Classical Defense, KGD	1.e4 e5 2.f4 Bc5
E48	Classical Defense, Nimzo-Indian; E48	1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Bd3 d5
D26	Classical Defense, QGA	1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.e3 e6 5.Bxc4 c5
D01	Classical Defense, Veresov	1.d4 d5 2.Nc3 Nf6 3.Bg5 e6 4.Nf3
B20	Classical Formation, Smith-Morra Accepted, Sicilian	1.e4 c5 2.d4 cxd4 3.c3 dxc3 4.Nxc3 Nc6 5.Nf3 d6 6.Bc4 a6 7.O-O Nf6
E05	Classical Line, Catalan; E05	1.d4 Nf6 2.c4 e6 3.g3 d5 4.Bg2 dxc4 5.Nf3 Be7
D86	Classical Main Line, Grunfeld; D86	1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.cxd5 Nxd5 5.e4 Nxc3 6.bxc3 Bg7 7.Bc4
B07	Classical System, Pirc	1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.Be2
D34	Classical Tarrasch Gambit	1.d4 d5 2.c4 e6 3.Nc3 c5 4.cxd5 exd5 5.Nf3 Nc6 6.g3 Nf6 7.Bg2 Be7 8.O-O O-O 9.dxc5 d4
A70	Classical Variation, Benoni; A70	1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.e4 g6 7.Nf3
C23	Classical Variation, Bishop; Boi Variation	1.e4 e5 2.Bc4 Bc5
B18	Classical Variation, Caro; B18	1.e4 c6 2.d4 d5 3.Nc3 dxe4 4.Nxe4 Bf5
A84	Classical Variation, Dutch	1.d4 f5 2.c4 e6
A90	Classical Variation, Dutch	1.d4 f5 2.c4 Nf6 3.g3 e6 4.Bg2
C48	Classical Variation, Four Knights	1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 4.Bb5 Bc5
C14	Classical Variation, French	1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bg5 Be7 5.e5 Nfd7 6.Bxe7 Qxe7
C11	Classical Variation, French; C11	1.e4 e6 2.d4 d5 3.Nc3 Nf6
C53	Classical Variation, Italian; C53	1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.c3
A01	Classical Variation, Larsen	1.b3 d5
D77	Classical Variation, Neo-Grunfeld; D77	1.d4 Nf6 2.c4 g6 3.g3 d5 4.Bg2 Bg7 5.Nf3 O-O 6.O-O
E32	Classical Variation, Nimzo-Indian; E32	1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Qc2
D67	Classical Variation, QGD	1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 O-O 6.Nf3 Nbd7 7.Rc1 c6 8.Bd3 dxc4 9.Bxc4 Nd5 10.Bxe7 Qxe7 11.O-O Nxc3 12.Rxc3
E17	Classical Variation, QID	1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3 Bb7 5.Bg2 Be7 6.O-O
C97	Classical Variation, Ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 d6 8.c3 O-O 9.h3 Na5 10.Bc2 c5 11.d4 Qc7 12.Nbd2
C45	Classical Variation, Scotch	1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Nxd4 Bc5
B56	Classical Variation, Sicilian	1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6
C64	Classical; Cordel Var, Ruy Lopez; C64	1.e4 e5 2.Nf3 Nc6 3.Bb5 Bc5
A00	Clemenz Opening	1.h3
C66	Closed Bernstein Variation, Ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 Nf6 4.O-O d6 5.d4 Bd7 6.Nc3 Be7 7.Bg5
C84	Closed Defense, Ruy Lopez; C84	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7
B01	Closed Scandavian	1.e4 d5 2.Nc3
C66	Closed Showalter Variation, Ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 Nf6 4.O-O d6 5.d4 Bd7 6.Nc3 Be7 7.Bxc6
A25	Closed System, Full Symmetry, King's English	1.c4 e5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.d3 d6
A26	Closed System, King's English; A26	1.c4 e5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.d3
E06	Closed Variation, Catalan	1.d4 Nf6 2.c4 e6 3.g3 d5 4.Bg2
E87	Closed Variation, KID; E87	1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f3 O-O 6.Be3 e5 7.d5
C66	Closed Wolf Variation, Ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 Nf6 4.O-O d6 5.d4 Bd7 6.Nc3 exd4
B23	Closed; Chigorin Variation, Sicilian; B23	1.e4 c5 2.Nc3
B45	Cobra Variation, Sicilian	1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Ndb5 Bc5
A00	Coca-Cola Gambit, Grob	1.g4 g5 2.f4
C42	Cochrane Gambit, Petroff	1.e4 e5 2.Nf3 Nf6 3.Nxe5 d6 4.Nxf7
C37	Cochrane Variation, KGA	1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Bc4 g4 5.Ne5  Qh4+ 6.Kf1 f3
D06	Cocquio Counter Gambit, QGD; Tan Gambit	1.d4 d5 2.c4 Nf6 3.cxd5 c6
D04	Colle System; D04	1.d4 d5 2.Nf3 Nf6 3.e3
B01	Collijn Variation, Center Counter	1.e4 d5 2.exd5 Qxd5 3.Nc3 Qa5 4.d4 e5 5.Nf3 Bg4
C58	Colman Variation, 2 Knights	1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.Ng5 d5 5.exd5 Na5 6.Bb5+ c6 7.dxc6 bxc6 8.Qf3 Rb8
A00	Cologne Gambit, Ware Opening	1.a4 b6 2.d4 d5 2.Nc3 Nd7
B00	Colorado Counter Accepted, Nimzovich Defense	1.e4 Nc6 2.Nf3 f5 3.exf5
B00	Colorado Defense, Nimzovich; Lean Variation	1.e4 Nc6 2.Nf3 f5
C52	Compromised Defense, Evans	1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.b4 Bxb4 5.c3 Ba5 6.d4 exd4 7.O-O dxc3
C21	Copenhagen Defense, Danish Gambit	1.e4 e5 2.d4 exd4 3.c3 dxc3 4.Bc4 cxb2 5.Bxb2 Bb4+
C67	Cordel Defense, Ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 Nf6 4.O-O Nxe4 5.d4 Be7 6.Qe2 Nd6 7.Bxc6+ bxc6 8.dxe5 Nf5
C64	Cordel Gambit, Ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 Bc5 4.c3 f5
C51	Cordel Line, Evans	1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.b4 Bxb4 5.c3 Be7 6.d4 Na5
C40	Corkscrew Counter-Gambit, Latvian	1.e4 e5 2.Nf3 f5 3.Nxe5 Nf6 4.Bc4 fxe4 5.Nf7 Qe7 8.Nxh8 d5
A43	Cormorant Gambit, Benoni	1.d4 c5 2.dxc5 b6
B00	Corn Stalks	1.e4 a5
B28	Cortlever Gambit, Sicilian	1.e4 c5 2.Nf3 a6 3.d4 cxd4 4.Bc4
B53	Cortlever Variation, Sicilian	1.e4 c5 2.Nf3 d6 3.d4 Nf6 4.dxc5 Nxe4 5.cxd6
D07	Costa's Line	1.d4 d5 2.c4 Nc6 3.cxd5 Qxd5 4.e3 e5 5.Nc3 Bb4 6.Bd2 Bxc3 7.Bxc3 exd4 8.Ne2
C39	Cotter Gambit, KGA	1.e4 e5 2.f4 exf4 3.Nf3 g5 4.h4 g4 5.Ne5 h6 6.Nxf7
D28	Counter Fianchetto Variation, QGA	1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.e3 e6 5.Bxc4 c5 6.O-O a6 7.Qe2 Nc6 8.dxc5
E60	Counterthrust Variation	1.d4 Nf6 2.c4 g6 3.g3 Bg7 4.Bg2 d5
D71	Counterthrust Variation	1.d4 Nf6 2.c4 g6 3.g3 d5 4.Bg2 Bg7
C42	Cozio (Lasker) Attack, Petroff	1.e4 e5 2.Nf3 Nf6 3.Nxe5 d6 4.Nf3 Nxe4 5.Qe2
C33	Cozio Attack, KGA	1.e4 e5 2.f4 exf4 3.Bc4 Qh4+ 4.Kf1 g5 5.Qf3
C70	Cozio Defense Deferred, Ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nge7
C60	Cozio Defense, Ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 Nge7
C33	Cozio Variation, KGA	1.e4 e5 2.f4 exf4 3.Bc4 Qh4+ 4.Kf1 d6
C33	Cozio; Hanneken; Prussian; Lichtenhein	1.e4 e5 2.f4 exf4 3.Bc4 Nf6
C54	Cracow Variation, Italian	1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.c3 Nf6 5.d4 exd4 6.cxd4 Bb4+ 7.Kf1
A00	Krazy Kat	1.Nh3 e5 2.f3 d5 3.Nf2
A00	Creepy Crawly Formation	1.a3 e5 2.h3 d5
C21	Crocodile Variation, Center Game	1.e4 e5 2.d4 exd4 3.f4 Bc5 4.Nf3 Nc6 5.c3
C25	Cunningham Defense, Vienna	1.e4 e5 2.Nc3 Nc6 3.f4 exf4 4.Nf3 Be7
C35	Cunningham Gambit, KGA; C35	1.e4 e5 2.f4 exf4 3.Nf3 Be7
B07	Czech Defense	1.e4 d6 2.d4 Nf6 3.Nc3 c6
B08	Czech Defense, Pirc	1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.Nf3 Bg7 5.Be2 O-O 6.O-O c6
D17	Czech Defense; Open Slav Defense; D17	1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 dxc4 5.a4 Bf5
A56	Czech Variation, Benoni	1.d4 Nf6 2.c4 c5 3.d5 e5 4.Nc3 d6 5.e4 Be7
A16	Czech Variation, English	1.c4 Nf6 2.Nc3 d5 3.cxd5 Nxd5 4.g3 g6 5.Bg2 Nb6
A46	Czech-Indian	1.d4 Nf6 2.Nf3 c6
A76	Czerniak Defesne, Benoni; A76	1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.e4 g6 7.Nf3 Bg7 8.Be2 O-O 9.O-O Re8
B14	Czerniak Line, Caro-Kann	1.e4 c6 2.d4 d5 3.exd5 cxd5 4.c4 Nf6 5.Nc3 Nc6 6.Bg5 Qa5
B77	Czerniak Variation, Sicilian Dragon	1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6 6.Be3 Bg7 7.f3 O-O 8.Qd2 Nc6 9.Bc4 Nxd4 10.Bxe4
D22	D22	1.d4 d5 2.c4 dxc4 3.Nf3 a6 4.e3
D23	D23	1.d4 d5 2.c4 dxc4 3.Nf3 Nf6
D25	D25	1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.e3
D29	D29	1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.e3 e6 5.Bxc4 c5 6.O-O a6 7.Qe2 b5 8.Bb3 Bb7
D30	D30	1.d4 d5 2.c4 e6
D34	D34	1.d4 d5 2.c4 e6 3.Nc3 c5 4.cxd5 exd5 5.Nf3 Nc6 6.g3 Nf6 7.Bg2 Be7
D35	D35	1.d4 d5 2.c4 e6 3.Nc3 Nf6
D41	D41	1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c5 5.cxd5
D42	D42	1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c5 5.cxd5 Nxd5 6.e3 Nc6 7.Bd3
D43	D43	1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6
D45	D45	1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.e3
D46	D46	1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.e3 Nbd7 6.Bd3
D52	D52	1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Nbd7 5.e3 c6 6.Nf3
D53	D53	1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7
D55	D55	1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 O-O 6.Nf3
D56	D56	1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 O-O 6.Nf3 h6 7.Bh4
D57	D57	1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 O-O 6.Nf3 h6 7.Bh4 Ne4 8.Bxe7 Qxe7 9.cxd5
D62	D62	1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 O-O 6.Nf3 Nbd7 7.Qc2 c5 8.cxd5
D63	D63	1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 O-O 6.Nf3 Nbd7 7.Rc1
D65	D65	1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 O-O 6.Nf3 Nbd7 7.Rc1 c6 8.Qc2 a6 9.cxd5
D66	D66	1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 O-O 6.Nf3 Nbd7 7.Rc1 c6 8.Bd3
D68	D68	1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 O-O 6.Nf3 Nbd7 7.Rc1 c6 8.Bd3 dxc4 9.Bxc4 Nd5 10.Bxe7 Qxe7 11.O-O Nxc3 12.Rxc3 e5
D69	D69	1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 O-O 6.Nf3 Nbd7 7.Rc1 c6 8.Bd3 dxc4 9.Bxc4 Nd5 10.Bxe7 Qxe7 11.O-O Nxc3 12.Rxc3 e5 13.dxe5
D71	D71	1.d4 Nf6 2.c4 Nc6 3.g3 d5
D72	D72	1.d4 Nf6 2.c4 g6 3.g3 d5 4.Bg2 Bg7 5.cxd5 Nxd5 6.e4 Nb6
D73	D73	1.d4 Nf6 2.c4 g6 3.g3 d5 4.Bg2 Bg7 5.Nf3
D75	D75	1.d4 Nf6 2.c4 g6 3.g3 d5 4.Bg2 Bg7 5.Nf3 O-O 6.cxd5 Nxd5 7.O-O c5
D76	D76	1.d4 Nf6 2.c4 g6 3.g3 d5 4.Bg2 Bg7 5.Nf3 O-O 6.cxd5 Nxd5 7.O-O Nb6
D79	D79	1.d4 Nf6 2.c4 g6 3.g3 d5 4.Bg2 Bg7 5.Nf3 O-O 6.O-O c6 7.cxd5
D84	D84	1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Bf4 Bg7 5.e3 O-O 6.cxd5 Nxd5
D88	D88	1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.cxd5 Nxd5 5.e4 Nxc3 6.bxc3 Bg7 7.Bc4 O-O 8.Ne2 c5 9.O-O Nc6 10.Be3 cxd4
D89	D89	1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.cxd5 Nxd5 5.e4 Nxc3 6.bxc3 Bg7 7.Bc4 O-O 8.Ne2 c5 9.O-O Nc6 10.Be3 cxd4 11.cxd4 Bg4 12.f3 Na5 13.Bd3
D93	D93	1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.Bf4 O-O 6.e3
D95	D95	1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.e3 O-O 6.Qb3
D97	D97	1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.Qb3 dxc4 6.Qxc4 O-O 7.e4
D99	D99	1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.Qb3 dxc4 6.Qxc4 O-O 7.e4 Bg4 8.Be3 Nfd7 9.Qb3
A00	Damhaug Gambit, Dunst	1.Nc3 d5 2.f4 e5
C40	Damiano Defense	1.e4 e5 2.Nf3 f6
C40	Damiano Gambit	1.e4 e5 2.Nf3 f6 3.Nxe5 fxe5 4.Qh5+ g6 5.Qxe5+ Qe7 6.Qxh8
C42	Damiano Variation, Petroff	1.e4 e5 2.Nf3 Nf6 3.Nxe5 Nxe4
C21	Danish Gambit	1.e4 e5 2.d4 exd4 3.c3
C21	Danish Gambit Accepted	1.e4 e5 2.d4 exd4 3.c3 dxc3 4.Bc4 cxb2 5.Bxb2
D70	Danube Gambit; Adorjan Gambit	1.d4 Nf6 2.c4 g6 3.d5 b5
D70	Danube; Donau Gambit	1.d4 Nf6 2.c4 g6 3.d5 b5 4.cxb5 a6 5.bxa6 c6
B12	De Bruycker Defense, Caro	1.e4 c6 2.d4 Na6
C55	De Riviere Gambit	1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.c3
E67	Debrecen Defense, KID; E67	1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.Nf3 d6 5.g3 O-O 6.Bg2 Nbd7
E72	Deferred Fianchetto, KID; E72	1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.g3
B50	Delayed Alapin, Sicilian	1.e4 c5 2.Nf3 d6 3.c3
C85	Delayed Exchange Ruy Lopez Deferred; C85	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Bxc6
C15	Delayed Exchange Variation, French	1.e4 e6 2.d4 d5 3.Nc3 Bb4 4.exd5
D74	Delayed Exchange Variation, Neo-Grunfeld; D74	1.d4 Nf6 2.c4 g6 3.g3 d5 4.Bg2 Bg7 5.Nf3 O-O 6.cxd5 Nxd5 7.O-O
E62	Delayed Fianchetto, KID; E62	1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.Nf3 d6 5.g3
B81	Delayed Keres Attack, Sicilian	1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e6 6.Be3 a6 7.g4
C41	Delmar Variation, Philidor	1.e4 e5 2.Nf3 d6 3.d4 Nd7 4.Bc4 c6 5.c3
A00	Despres Opening	1.h4
C50	Deutz Gambit, Italian	1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.O-O Nf6 5.d4
D26	Development Variation, QGA	1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.e3 e6 5.Bxc4 c5 6.O-O Nc6
E00	Devin Gambit, Catalan	1.d4 Nf6 2.c4 e6 3.g4
D00	Diemer Attack, BDG	1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 exf3 5.Nxf3 g6 6.Bf4
A40	Diemer Counterattack	1.d4 e5 2.d5 Bc5 3.e4 Qh4
D00	Diemer Gambit, BDG	1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 Bf5 5.fxe4
D10	Diemer Gambit, Slav	1.d4 d5 2.c4 c6 3.e4
B12	Diemer-Duhm Gambit, Caro	1.e4 c6 2.d4 d5 3.c4
C00	Diemer-Duhm Gambit, French	1.e4 e6 2.d4 d5 3.c4
D00	Diemer-Rosenberg Attack, BDG	1.d4 d5 2.e4 dxe4 3.Be3
C40	Diepstraten Countergambit, Latvian	1.e4 e5 2.Nf3 f5 3.c4
C82	Dilworth; Kleczynski Var, Ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Nxe4 6.d4 b5 7.Bb3 d5 8.dxe5 Be6 9.c3 Bc5 10.Nbd2 O-O 11.Bc2
A57	Dlugy Variation, Benko Gambit	1.d4 Nf6 2.c4 c5 3.d5 b5 4.cxb5 a6 5.f3
C33	Dodo Gambit, KGA	1.e4 e5 2.f4 exf4 3.Qg4
E94	Donner Variation, KID	1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 O-O 6.Be2 e5 7.O-O c6
B51	Dorfman Gambit, Sicilian	1.e4 c5 2.Nf3 d6 3.Bb5+ Nc6 4.O-O Bd7 5.Qe2 g6 6.e5
E10	Dory (Doery) Defense	1.d4 Nf6 2.c4 e6 3.Nf3 Ne4
A46	Dory Defense	1.d4 Nf6 2.Nf3 Ne4
A30	Double Fianchetto Defense, English	1.c4 c5 2.Nf3 Nf6 3.g3 b6 4.Bg2 Bb7 5.O-O g6
A08	Double Fianchetto, KIA	1.Nf3 d5 2.g3 g6
E82	Double Fianchetto, KID; E82	1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f3 O-O 6.Be3 b6
A38	Double Fianchetto, Symmetrical English	1.c4 c5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.Nf3 Nf6 6.O-O O-O 7.b3
C56	Double Gambit Accepted, Two Knights	1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.d4 exd4 5.O-O Nxe4
A00	Double Grob	1.g4 g5
C37	Double Muzio Gambit, KGA	1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Bc4 g4 5.O-O gxf3 6.Qxf3 Qf6 7.e5 Qxe5 8.Bxf7+
C44	Double Pawn Sacrifice, Goering Gambit	1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.c3 dxc3 5.Bc4
C49	Double Ruy Lopez Opening, 4 Knights; C49	1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 4.Bb5 Bb4
A20	Double Whammy, English	1.c4 e5 2.f4
B27	Double-Dutch Gambit, Sicilian	1.e4 c5 2.Nf3 f5 3.exf5 Nh6
A00	Dougherty Gambit, Dunst	1.Nc3 d5 2.e4 dxe4 3.f3
B09	Dragon Formation, Pirc	1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.f4 Bg7 5.Nf3 c5
B60	Dragon Variation, Richter-Rauzer Sicilian	1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Bg5 g6
B70	Dragon Variation, Sicilian; B70	1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6
C44	Dresden Opening	1.e4 e5 2.Nf3 Nc6 3.c4
B12	Dreyev Defense, Caro-Kann	1.e4 c6 2.d4 d5 3.e5 Bf5 4.Nc3 Qb6
D00	Dries Counter-Attack, BDG	1.d4 d5 2.e4 dxe4 3.Nc3 c5
A20	Drill Variation, English	1.c4 e5 2.g3 h5
C33	Drunken King, KGA	1.e4 e5 2.f4 exf4 3.Kf2
A00	Drunken Knight Opening	1.Nh3
B20	Dubois Variation, Sicilian	1.e4 c5 2.d4 cxd4 3.c3 d3 4.c4
A38	Duchamp Variation, Symmetrical English	1.c4 c5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.Nf3 Nf6 6.O-O O-O 7.d3
A02	Dudweiller Gambit, Bird	1.f4 d5 2.g4
A00	Duesseldorf Gambit, Durkin	1.Nc3 c5 2.b4
C40	Duke of Courland Variation, Latvian	1.e4 e5 2.Nf3 f5 3.Bc4 fxe4 4.Nxe5 Qg5 5.d4 Qxg2 6.Qh5 g6 7.Bf7 Kd8 9.Bg6 Qh1
A00	Dunst (Perrenet) Gambit	1.Nc3 d5 2.e4 dxe4 3.d3
A00	Dunst; Heinrichsen; Will Bull; Kotrc; Van Geet	1.Nc3
A40	Dunworth Variation, Modern Defense	1.e4 g6 2.d4 Bg7 3.c4 d5 4.exd5 c6 5.dxc6 Bxd4
C12	Duras Variation, French	1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bg5 Bb4 5.e5 h6 6.Bd2 Bxc3 7.bxc3 Ne4 8.Qg4 Kf8 9.Bc1
D30	Duras Variation, QGD; Capablanca Variation	1.d4 d5 2.c4 e6 3.Nf3 Nf6 4.Bg5 h6
C77	Duras Variation, Ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.d3 d6 6.c4
C65	Duras Variation, Ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 Nf6 4.d3 d6 5.c4
A00	Durkin Gambit	1.Na3 e5 2.Nc4 Nc6 3.e4 f5
A00	Durkin's Opening; Sodium Attack	1.Na3
E10	Dus-Chotimursky Variation	1.d4 Nf6 2.c4 e6 3.Nf3 c5 4.d5 b5 5.Bg5
A80	Dutch Defense; A80	1.d4 f5
A81	Dutch Indian; Leningrad Variation, Dutch; A81	1.d4 f5 2.g3
D00	Dutch System, QP	1.d4 d5 2.Nc3 f5
A03	Dutch Variation, Bird; A03	1.f4 d5
A01	Dutch Variation, Larsen	1.b3 f5
D18	Dutch Variation, Slav; D18	1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 dxc4 5.a4 Bf5 6.e3
A04	Dutch Variation, Zukertort	1.Nf3 f5
D00	Duthilleuk Gambit, BDG	1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 exf3 5.Nxf3 e6 6.Bd3 Nc6 7.Bg5 Be7 8.Ne4
A53	Duz-Khotimirsky Variation	1.d4 Nf6 2.c4 d6 3.Nc3 Nbd7 4.e3 e5 5.Bd3
E76	Dynamic Attack, KID	1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f4 O-O 6.Nf3 c5 7.d5
E10	Dzindzi-Indian Defense	1.d4 Nf6 2.c4 e6 3.Nf3 a6
E01	E01	1.d4 Nf6 2.c4 e6 3.g3 d5
E02	E02	1.d4 Nf6 2.c4 e6 3.g3 d5 4.Bg2 dxc4
E03	E03	1.d4 Nf6 2.c4 e6 3.g3 d5 4.Bg2 dxc4 5.Qa4+ Nbd7 6.Qxc4
E06	E06	1.d4 Nf6 2.c4 e6 3.g3 d5 4.Bg2 Be7
E07	E07	1.d4 Nf6 2.c4 e6 3.g3 d5 4.Bg2 Be7 5.Nf3 O-O 6.O-O Nbd7
E08	E08	1.d4 Nf6 2.c4 e6 3.g3 d5 4.Bg2 Be7 5.Nf3 O-O 6.O-O Nbd7 7.Qc2
E09	E09	1.d4 Nf6 2.c4 e6 3.g3 d5 4.Bg2 Be7 5.Nf3 O-O 6.O-O Nbd7 7.Qc2 c6 8.Nbd2
E13	E13	1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.Nc3 Bb7 5.Bg5 h6 6.Bh4 Bb4
E18	E18	1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3 Bb7 5.Bg2 Be7 6.O-O O-O 7.Nc3
E19	E19	1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3 Bb7 5.Bg2 Be7 6.O-O O-O 7.Nc3 Ne4 8.Qc2
E20	E20	1.d4 Nf6 2.c4 e6 3.Nc3
E25	E25	1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.a3 Bxc3+ 5.bxc3 c5 6.f3 d5 7.cxd5
E27	E27	1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.a3 Bxc3+ 5.bxc3 O-O
E28	E28	1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.a3 Bxc3+ 5.bxc3 O-O 6.e3
E29	E29	1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.a3 Bxc3+ 5.bxc3 O-O 6.e3 c5 7.Bd3 Nc6
E35	E35	1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Qc2 d5 5.cxd5 exd5
E36	E36	1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Qc2 d5 5.a3
E37	E37	1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Qc2 d5 5.a3 Bxc3+ 6.Qxc3 Ne4
E50	E50	1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Nf3
E54	E54	1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Nf3 d5 6.Bd3 c5 7.O-O dxc4 8.Bxc4
E57	E57	1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Nf3 d5 6.Bd3 c5 7.O-O Nc6 8.a3 dxc4 9.Bxc4 cxd4
E58	E58	1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Nf3 d5 6.Bd3 c5 7.O-O Nc6 8.a3 Bxc3 9.bxc3
E59	E59	1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Nf3 d5 6.Bd3 c5 7.O-O Nc6 8.a3 Bxc3 9.bxc3 dxc4 10.Bxc4
E61	E61	1.d4 Nf6 2.c4 g6 3.Nc3
E65	E65	1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.Nf3 d6 5.g3 O-O 6.Bg2 c5 7.O-O
E66	E66	1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.Nf3 d6 5.g3 O-O 6.Bg2 c5 7.O-O Nc6 8.d5
E68	E68	1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.Nf3 d6 5.g3 O-O 6.Bg2 Nbd7 7.O-O e5 8.e4
E69	E69	1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.Nf3 d6 5.g3 O-O 6.Bg2 Nbd7 7.O-O e5 8.e4 c6 9.h3
E73	E73	1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Be2
E75	E75	1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Be2 O-O 6.Bg5 c5 7.d5 c6
E77	E77	1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f4 O-O 6.Be2
E84	E84	1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f3 O-O 6.Be3 Nc6 7.Nge2 a6 8.Qd2 Rb8
E86	E86	1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f3 O-O 6.Be3 e5 7.Nge2 c6
E88	E88	1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f3 O-O 6.Be3 e5 7.d5 c6
E89	E89	1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f3 O-O 6.Be3 e5 7.d5 c6 8.Nge2
E90	E90	1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3
E92	E92	1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 O-O 6.Be2 e5
E93	E93	1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 O-O 6.Be2 e5 7.d5 Nbd7
E94	E94	1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 O-O 6.Be2 e5 7.O-O
E95	E95	1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 O-O 6.Be2 e5 7.O-O Nbd7 8.Re1
E96	E96	1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 O-O 6.Be2 e5 7.O-O Nbd7 8.Re1 c6 9.Bf1 a5
E98	E98	1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 O-O 6.Be2 e5 7.O-O Nc6 8.d5 Ne7 9.Ne1
E00	East Indian Defense; E00	1.d4 Nf6 2.c4 e6
A40	Eastbourne Gambit	1.d4 b6 2.c4 Bb7 3.Bxb5
B25	Edge Variation, Sicilian Closed	1.e4 c5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.d3 d6 6.f4 e5 7.Nh3 Nge7
A45	Edge Variation, Trompowsky	1.d4 Nf6 2.Bg5 Ne4 3.Bh4
B12	Edinburgh Variation, Caro	1.e4 c6 2.d4 d5 3.Nd2 Qb6
C27	Eifel Gambit, Vienna	1.e4 e5 2.Nc3 Nf6 3.Bc4 Bc5 4.Nge2 b5
C33	Eisenberg Variation, KGA	1.e4 e5 2.f4 exf4 3.Nh3
A00	Ekolu Variation	1.e3 e5 2.Nc3 d5 3.f4 exf4 4.Nf3
C81	Ekstrom Variation, Ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Nxe4 6.d4 b5 7.Bb3 d5 8.dxe5 Be6 9.Qe2 Be7 10.Rd1 O-O 11.c4
D44	Ekstrom Variation, Semi-Slav	1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.Bg5 dxc4 6.e4 b5 7.e5 h6 8.Bh4 g5 9.exf6 gxh4 10.Ne5
B00	El Columpio Defense, Nimzovich Defense	1.e4 Nc6 2.Nf3 Nf6 3.e5 Ng4
C40	Elephant Gambit; Queen Pawn Counter Gambit	1.e4 e5 2.Nf3 d5
D00	Elbert Counter-Gambit, BDG	1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 e5
C10	Ellis Gambit, French	1.e4 e6 2.d4 d5 3.Nc3 dxe4 4.Nxe4 e5
D00	Endgame Variation, BDG	1.d4 d5 2.e4 dxe4 3.Nc3 e5 4.dxe5
D34	Endgame Variation, Tarrasch	1.d4 d5 2.c4 e6 3.Nc3 c5 4.cxd5 exd5 5.Nf3 Nc6 6.g3 Nf6 7.Bg2 Be7 8.O-O O-O 9.Bg5 Be6
B80	English Attack, Scheveningen Sicilian	1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e6 6.Be3 a6 7.f3
A13	English Defense	1.c4 e6 2.d4 b6
A40	English Defense	1.d4 e6 2.c4 b6
E20	English Hybrid, Nimzo-Indian	1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Nf3 c5 5.g3 O-O 6.Bg2 cxd4 7.Nxd4 d5 8.cxd5 Nxd5
A10	English Opening; A10	1.c4
A15	English Orangutan	1.c4 Nf6 2.b4
A20	English Queen	1.c4 e5 2.Qa4
A42	English Rat	1.d4 d6 2.c4 e5
A10	English Spike	1.c4 f5 2.g4
A01	English Variation, Larsen	1.b3 c5
C86	English Variation, Ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Qe2 b5 7.Bb3 O-O 8.c3 d6 9.d4 Bg4
A40	Englund Gambit	1.d4 e5 2.dxe5 Nc6 3.Nf3 Qe7
A40	Englund Gambit Declined	1.d4 e5 2.d5
A40	Englund; Behting Gambit	1.d4 e5 2.dxe5 Nc6
B00	Erben Gambit, Nimzovich Defense	1.e4 Nc6 2.d4 d5 3.Nc3 g6
C25	Erben Gambit, Vienna	1.e4 e5 2.Nc3 Nf6 3.g3 d5 4.exd5 c6
A22	Erbenheimer Gambit, English	1.c4 e5 2.Nc3 Nf6 3.Nf3 e4 4.Ng5 Ng4
D00	Euwe Variation, BDG	1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 exf3 5.Nxf3 e6
C02	Euwe Variation, French	1.e4 e6 2.d4 d5 3.e5 c5 4.c3 Nc6 5.Nf3 Bd7
E21	Euwe Variation, Nimzo-Indian	1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Nf3 c5 5.d5 Ne4
E17	Euwe Variation, QID	1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3 Bb7 5.Bg2 Be7 6.O-O O-O 7.b3
D00	Euwe Variation, Queen Pawn Game	1.d4 d5 2.Bg5 h6 3.Bh4 c6 4.Nf3 Qb6
A48	Euwe Variation, Torre Attack	1.d4 Nf6 2.Nf3 g6 3.Bg5 Bg7 4.Nbd2 c5
C51	Evans Gambit Accepted	1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.b4 Bxb4
C51	Evans Gambit; C51	1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.b4
B02	Everglades Defense, Alekhine	1.e4 Nf6 2.e5 Ng8 3.d4 f5
B13	Exchange Variation, Caro; B13	1.e4 c6 2.d4 d5 3.exd5
D07	Exchange Variation, Chigorin Defense	1.d4 d5 2.c4 Nc6 3.cxd5 Qxd5
E79	Exchange Variation, Four Pawns Attack, KID; E79	1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f4 O-O 6.Be2 c5 7.Nf3 cxd4 8.Nxd4 Nc6 9.Be3
C01	Exchange Variation, French	1.e4 e6 2.d4 d5 3.exd5 exd5
D85	Exchange Variation, Grunfeld;	1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.cxd5 Nxd5 5.e4 Nxc3 6.bxc3
D85	Exchange Variation, Grunfeld; D85	1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.cxd5 Nxd5
D71	Exchange Variation, Neo-Grunfeld	1.d4 Nf6 2.c4 g6 3.g3 d5 4.Bg2 Bg7 5.cxd5 Nxd5
C41	Exchange Variation, Philidor	1.e4 e5 2.Nf3 d6 3.d4 exd4
D35	Exchange Variation, QGD	1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.cxd5
B62	Exchange Variation, Richter-Rauzer Sicilian	1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Bg5 e6 7.Nxc6
C68	Exchange Variation, Ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Bxc6
C63	Exchange Variation, Schliemann Ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 f5 4.Bxc6
D10	Exchange Variation, Slav	1.d4 d5 2.c4 c6 3.cxd5
D13	Exchange Variation, Slav; D13	1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.cxd5
D59	Exchange Variation, Tartakower Defense, QGD; D59	1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 O-O 6.Nf3 h6 7.Bh4 b6 8.cxd5 Nxd5
C02	Extended Bishop Swap, French	1.e4 e6 2.d4 d5 3.e5 Bd7
A51	Fajarowicz Variation, Budapest	1.d4 Nf6 2.c4 e5 3.dxe5 Ne4
C31	Falkbeer Countergambit Accepted, KGD	1.e4 e5 2.f4 d5 3.exd5
C31	Falkbeer Counter-Gambit, KGD; C31	1.e4 e5 2.f4 d5
C26	Falkbeer Variation, Vienna; C26	1.e4 e5 2.Nc3 Nf6
B12	Fantasy; Lilienfisch Variation, Caro	1.e4 c6 2.d4 d5 3.f3
E12	Farago Defense, QID	1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.a3 Ba6 5.Qc2 Bb7
D17	Fazekas Gambit, Slav	1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 dxc4 5.a4 Bf5 6.Ne5 Na6 7.e4
A40	Felbecker Gambit	1.d4 e5 2.dxe5 Nc6 3.Nf3 Bc5
D00	Fianchetto Defense, QP	1.d4 d5 2.Nc3 g6 3.Nf3 Bg7
B20	Fianchetto Defense, Smith-Morra Accepted, Sicilian	1.e4 c5 2.d4 cxd4 3.c3 dxc3 4.Nxc3 e6 5.Nf3 g6
A48	Fianchetto Defense, Torre Attack	1.d4 Nf6 2.Nf3 g6 3.Bg5
B06	Fianchetto Gambit, Modern Defense	1.e4 g6 2.d4 f5
A29	Fianchetto Line, Four Knights English; A29	1.c4 e5 2.Nc3 Nc6 3.Nf3 Nf6 4.g3
A24	Fianchetto Lines, Two Knights Variation, English; A24	1.c4 e5 2.Nc3 Nf6 3.g3 g6
E15	Fianchetto System, QID; E15	1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3
E16	Fianchetto Traditional, QID; E16	1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3 Bb7
D09	Fianchetto Variation, Albin Countergambit; D09	1.d4 d5 2.c4 e5 3.dxe5 d4 4.Nf3 Nc6 5.g3
A58	Fianchetto Variation, Benko Gambit	1.d4 Nf6 2.c4 c5 3.d5 b5 4.cxb5 a6 5.bxa6 Bxa6 6.Nc3 g6 7.Nf3 d6 8.g3 Bg7 9.Bg2
A62	Fianchetto Variation, Benoni	1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.Nf3 g6 7.g3 Bg7 8.Bg2
A86	Fianchetto Variation, Dutch; A86	1.d4 f5 2.c4 Nf6 3.g3
E60	Fianchetto Variation, KID	1.d4 Nf6 2.c4 g6 3.g3
D66	Fianchetto Variation, Orthodox Defense, QGD	1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 O-O 6.Nf3 Nbd7 7.Rc1 c6 8.Bd3 dxc4 9.Bxc4 b5
B58	Fianchetto Variation, Richter-Rauzer Sicilizn	1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.g3
B80	Fianchetto Variation, Scheveningen Sicilian	1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e6 6.g3
B24	Fianchetto Variation, Sicilian Closed; B24	1.e4 c5 2.Nc3 Nc6 3.g3
B70	Fianchetto Variation, Sicilian Dragon	1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6 6.g3
A34	Fianchetto Variation, Symmetrical English	1.c4 c5 2.Nc3 Nf6 3.g3
A36	Fianchetto Variation, Symmetrical English; A36	1.c4 c5 2.Nc3 Nc6 3.g3
E16	Fine Variation, QID	1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3 Bb7 5.Bg2 Qc8 6.O-O c5 7.d5
C15	Fingerslip Variation, French	1.e4 e6 2.d4 d5 3.Nc3 Bb4 4.Bd2
B16	Finnish Variation, Caro-Kann	1.e4 c6 2.d4 d5 3.Nc3 dxe4 4.Nxe4 h6
B86	Fischer Attack, Sozin Attack, Sicilian; B86	1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e6 6.Bc4
C34	Fischer Defense, KGA	1.e4 e5 2.f4 exf4 3.Nf3 d6
E44	Fischer Variation, Nimzo-Indian; E44	1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 b6 5.Ne2
C89	Fischer Variation, Ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 O-O 8.c3 d5 9.exd5 Nxd5 10.Nxe5 Nxe5 11.Rxe5 c6 12.g3
C66	Fishing Pole Variation, Ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 Nf6 4.O-O Ng4
B87	Flank Variation, Sicilian; B87	1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e6 6.Bc4 a6 7.Bb3 b5
C45	Fleissig; Meitner Variation, Scotch	1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Nxd4 Bc5 5.Be3 Qf6 6.c3 Nge7 7.Nc2
E73	Flexible Defense, KID	1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Be2 O-O 6.Bg5 h6
A28	Flexible Line, English	1.c4 e5 2.Nc3 Nc6 3.Nf3 Nf6 4.d3
A19	Floh-Mikenas-Carls Variation, English; A19	1.c4 Nf6 2.Nc3 e6 3.e4 c5
B05	Flohr Variation, Alekhine	1.e4 Nf6 2.e5 Nd5 3.d4 d6 4.Nf3 Bg4 5.Be2 c6
B18	Flohr Variation, Caro-Kann	1.e4 c6 2.d4 d5 3.Nc3 dxe4 4.Nxe4 Bf5 5.Ng3 Bg6 6.Nh3
D80	Flohr Variation, Grunfeld	1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.e3 Bg7 5.Nf3 O-O 6.Bd3 c6 7.O-O Bf5
D90	Flohr Variation, Grunfeld	1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.Qa4+
B32	Flohr Variation, Sicilian	1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 Qc7
D25	Flohr; Winawer Variation, QGA	1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.e3 Be6
C92	Flohr; Zaitsev; Lenzerheide Var, Ruy	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 d6 8.c3 O-O 9.h3 Bb7
A18	Flohr-Mikenas-Carls Variation, English; A18	1.c4 Nf6 2.Nc3 e6 3.e4
E77	Florentine Gambit, KID	1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f4 O-O 6.Be2 c5 7.d5 e6 8.Nf3 exd5 9.e5
E78	Fluid Attack, KID; E78	1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f4 O-O 6.Be2 c5 7.Nf3
A87	Fluid Formation, Dutch	1.d4 f5 2.c4 Nf6 3.g3 g6 4.Bg2 Bg7 5.Nf3 O-O 6.O-O d6
D33	Folkestone; Swedish Var, QGD	1.d4 d5 2.c4 e6 3.Nc3 c5 4.cxd5 exd5 5.Nf3 Nc6 6.g3 c4
C40	Foltys Variation, Latvian	1.e4 e5 2.Nf3 f5 3.Nxe5 Qf6 4.Nc4 fxe4 5.d3
C40	Foltys-Leonhardt Variation, Latvian Gambit	1.e4 e5 2.Nf3 f5 3.Nxe5 Qf6 4.Nc4
B15	Forgacs Variation, Caro Kann	1.e4 c6 2.d4 d5 3.Nc3 dxe4 4.Nxe4 Nf6 5.Nxf6+ exf6 6.Bc4
C10	Fort Knox Variation, French	1.e4 e6 2.d4 d5 3.Nc3 dxe4 4.Bd7 5.Nf3 Bc6
C47	Four Knights Openng; C47	1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6
A28	Four Knights Variation, English	1.c4 e5 2.Nc3 Nc6 3.Nf3 Nf6 4.d4 exd4 5.Nxd4Bb4 6.Bg5 h6 7.Bh4 Bxc3+ 8.bxc3 Ne5
A28	Four Knights Variation, English; A28	1.c4 e5 2.Nc3 Nc6 3.Nf3 Nf6
D28	Four Knights Variation, QGA	1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.e3 e6 5.Bxc4 c5 6.O-O a6 7.Qe2 Nc6 8.Nc3
B45	Four Knights Variation, Sicilian	1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6
B33	Four Knights Variation, Sicilian	1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3
A34	Four Knights Variation, Symmetrical English	1.c4 c5 2.Nc3 Nf6 3.Nf3 Nf6
A68	Four Pawns Attack, Benoni	1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.e4 g6 7.f4 Bg7 8.Nf3 O-O
E76	Four Pawns Attack, KID; E76	1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f4
B03	Four Pawns Attack; Chase V	1.e4 Nf6 2.e5 Nd5 3.d4 d6 4.c4 Nb6 5.f4
A43	Franco-Benoni; Franco-Sicilian	1.d4 c5 2.d5 e6 3.e4
C01	Franco-Hiva Gambit I, French	1.e4 e6 2.d4 f5
C00	Franco-Hiva Gambit, French	1.e4 e6 2.d3 f5
A40	Franco-Indian Defense	1.d4 e6
B00	Franco-Nimzovich Variation	1.e4 Nc6 2.Nf3 e6
C00	Franco-Sicilian Defense	1.d4 e6 2.c4 c5
A43	Franco-Sicilian Hybrid	1.d4 e6 2.c4 c5 3.d5 exd5 4.cxd5 d6 5.Nc3 g6 6.e4 Bg7 7.Nf3 Ne7
C27	Frankenstein-Dracula Var, Vienna	1.e4 e5 2.Nc3 Nf6 3.Bc4 Nxe4 4.Qh5 Nd6 5.Bb3 Nc6 6.Nb5 g6 7.Qf3 f5 8.Qd5 Qe7
C60	Frankfort; Gunderam Var, Ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 Qf6
C13	Frankfurt Variation, French	1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bg5 Be7 5.e5 Ng8 6.Be3 b6
C45	Fraser Attack, Scotch	1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Nxd4 Qh4 5.Nf3
C51	Fraser Attack; Mortimer, Evans	1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.b4 Bxb4 5.c3 Bc5 6.d4 exd4 7.O-O d6 8.cxd4 Bb6 9.Nc3 Bg4 10.Qa4
C40	Fraser Defense, Latvian	1.e4 e5 2.Nf3 f5 3.Nxe5 Nc6
C33	Fraser Variation, KGA	1.e4 e5 2.f4 exf4 3.Bc4 Qh4+ 4.Kf1 g5 5.Nc3 Bg7 6.g3 fxg3 7.Qf3
C25	Fraser-Minckwitz Variation, Vienna	1.e4 e5 2.Nc3 Nc6 3.f4 exf4 4.d4 Qh4+ 5.Ke2 b6
B90	Freak Attack, Siicilian	1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Rg1
B00	Fred; From Reversed	1.e4 f5
B27	Frederico Variation, Sicilian	1.e4 c5 2.Nf3 g6 3.d4 f5
C42	French Attack, Petroff	1.e4 e5 2.Nf3 Nf6 3.Nxe5 d6 4.Nf3 Nxe4 5.d3
B00	French Connection, Nimzovich Defense	1.e4 Nc6 2.d4 e6
C00	French Defense; C00	1.e4 e6
B40	French Variation, Sicilian; B40	1.e4 c5 2.Nf3 e6
C02	Frenkel Gambit, French	1.e4 e6 2.d4 d5 3.e5 c5 4.b4
C10	Frere; Becker; Katilimov, Maric Var, French	1.e4 e6 2.d4 d5 3.Nc3 dxe4 4.Nxe4 Qd5
C60	Fricke Gambit, Ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 d5 4.Nxe5 Qg5 5.O-O
B02	Fried Fox, Alekhine; Krejcik Gambit	1.e4 Nf6 2.Bc4 Nxe4 3.Bxf7+
C57	Fried Liver; Fegatello Attack, 2 Knights	1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.Ng5 d5 5.exd5 Nxd5 6.Nxf7
C80	Friess Attack, Ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Nxe4 6.d4 b5 7.Nxe5
D00	Fritz Gambit, BDG	1.d4 d5 2.e4 dxe4 3.Bc4
A00	Fritz Gambit, Grob	1.g4 d5 2.Bg2 Bxg4 3.c4
C57	Fritz Variation, 2 Knights	1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.Ng5 d5 5.exd5 Nd4
C37	From Defense, KGA	1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Bc4 g4 5.O-O gxf3 6.Qxf3 Qe7
A02	From's Gambit, Bird	1.f4 e5
A38	Full Symmetry Line, Symmetrical English; A38	1.c4 c5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.Nf3 Nf6
A58	Fully Accepted Variation, Benko Gambit; A58	1.d4 Nf6 2.c4 c5 3.d5 b5 4.cxb5 a6 5.bxa6
D27	Furman Variation, QGA	1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.e3 e6 5.Bxc4 c5 6.O-O a6 7.dxc5 Bxc5
C70	Furman-Taimanov; Wing Var, Ruy; Norwegian Variation	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 b5 5.Bb3 Na5
C25	Fyfe Gambit, Vienna	1.e4 e5 2.Nc3 Nc6 3.d4
C33	Gaga Gambit, KGA	1.e4 e5 2.f4 exf4 3.g3
C33	Gama Gambit, KGA	1.e4 e5 2.f4 exf4 3.g3 fxg3 4.Nf3
A00	Gambit 59; Buecker Gambit	1.g3 d5 2.Bg2 e5 3.b4
B28	Gambit Line, O'Kelly Sicilian	1.e4 c5 2.Nf3 a6 3.c3 d5 4.exd5 Nf6
B44	Gary Gambit, Sicilian	1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nc6 5.Nb5 d6 6.c4 Nf6 7.N1c3 a6 8.Na3 d5
B40	Gaw-Paw Variation, Sicilian	1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Qb6
A45	Gedult Attack	1.d4 Nf6 2.f3 d5 3.g4
A45	Gedult-Gunderam System	1.d4 Nf6 2.f3 d5 3.g4
E73	Geller Defense, KID	1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Be2 O-O 6.Bg5 Nbd7
B28	Geller Line, Sicilian	1.e4 c5 2.Nf3 a6 3.c4 Nc6 4.d4 cxd4 5.Nxd4 e5
C89	Geller Variation, Ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 O-O 8.c3 d5 9.exd5 Nxd5 10.Nxe5 Nxe5 11.Rxe5 c6 12.d4 Bd6 13.Re1 Qh4 14.g3 Qh3
C45	Geller Variation, Scotch	1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Nxd4 Bc5 5.Nb3 Bb6 6.a4 a6 7.Nc3 Nf6
A33	Geller Variation, Symmetrical English	1.c4 c5 2.Nf3 Nf6 3.d4 cxd4 4.Nxd4 e6 5.Nc3 Nc6 6.g3 Qb6
D15	Geller Variation; Geller-Tolush Var, Slav	1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 dxc4 5.e4
B06	Geller's System, Modern Defense	1.e4 g6 2.d4 Bg7 3.Nf3 d6 3.c3
A21	General Variation, King's English	1.c4 e5 2.Nc3 d6 3.Nf3
A83	General Variation, Staunton Gambit, Dutch; A83	1.d4 f5 2.e4 fxe4 3.Nc3 Nf6 4.Bg5
B02	Geschev Gambit, Alekhine	1.e4 Nf6 2.Nc3 d5 3.exd5 c6
C37	Ghulam Kassim; Koch Gambit, KGA	1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Bc4
C37	Ghulam-Kassim Gambit, KGA	1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Bc4 g4 5.d4 gxf3 6.Qxf3
C34	Gianutio Countergambit, KGA	1.e4 e5 2.f4 exf4 3.Nf3 f5
C33	Gianutio Counter-Gambit, KGA	1.e4 e5 2.f4 exf4 3.Bc4 f5
A45	Gibbins-Wiedehagen Gambit Accepted	1.d4 Nf6 2.g4 Nxg4
D80	Gibbon Gambit; Grunfeld Spike	1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.g4
D00	Giertz-Peters Gambit, BDG	1.d4 d5 2.e4 dxe4 3.Nc3 e6 4.f3
B55	Ginsberg Gambit, Sicilian	1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Bc4
B01	Gipslis Variation, Center Counter	1.e4 d5 2.exd5 Nf6 3.d4 Nxd5 4.Nf3 Bg4
C25	Giraffe Attack, Vienna	1.e4 e5 2.Nc3 Bc5 3.Qg4
C53	Giuoco Pianissimo	1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.c3 Nf6 5.d3
C50	Giuoco Pianissimo	1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.d3
C50	Giuoco Piano; Italian Opening	1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5
A00	Gladbacher Gambit, Dunst	1.Nc3 e5 2.b3 d5 3.e4 dxe4 4.d3
A00	Glasscoe Gambit, Dunst	1.Nc3 f5 2.g4
C40	Glatz Gambit; Busch-Gass Gambit	1.e4 e5 2.Nf3 Bc5
C11	Gledhill Attack, French	1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.e5 Nfd7 5.Qg4
E94	Glek Defense, KID	1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 O-O 6.Be2 e5 7.O-O Na6
C69	Gligoric Variation, Ruy Lopez; C69	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Bxc6 dxc6 5.O-O f6
E92	Gligoric-Taimanov Variation, KID	1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 O-O 6.Be2 e5 7.Be3
B20	Gloria Variation, Sicilian	1.e4 c5 2.c4 d6 3.Nc3 Nc6 4.g3 h5
D21	Godes Variation, QGA	1.d4 d5 2.c4 dxc4 3.Nf3 Nd7
B32	Godiva Variation, Sicilian	1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 Qb6
C51	Goering Attack, Evans	1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.b4 Bxb4 5.c3 Bc5 6.d4 exd4 7.O-O d6 8.cxd4 Bb6 9.Nc3 Na5 10.Bg5
C44	Goering Gambit Declined, Scotch	1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.c3 d5
C44	Goering Gambit, Scotch	1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.c3
C59	Goering Variation, Two Knights	1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.Ng5 d5 5.exd5 Na5 6.Bb5+ c6 7.dxc6 bxc6 8.Be2 h6 9.Nf3 e4 10.Ne5
D70	Goglidze Attack	1.d4 Nf6 2.c4 g6 3.f3 d5
B10	Goldman Variation, Caro	1.e4 c6 2.Nc3 d5 3.Qf3
A16	Golombek Defense, English; Anti English	1.c4 Nf6 2.Nc3 d5
D03	Gossip Variation, QP	1.d4 d5 2.Nf3 Nf6 3.Bg5 Ne4
B23	Grand Prix Variation, Sicilian	1.e4 c5 2.Nc3 d6 3.f4
C70	Graz Variation, Ruy	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 b5 5.Bb3 Bc5
A10	Great Snake, English	1.c4 g6
C40	Greco Defense	1.e4 e5 2.Nf3 Qf6
C23	Greco Gambit, Bishop	1.e4 e5 2.Bc4 Nf6 3.f4
C38	Greco Gambit, KGA	1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Bc4 Bg7 5.h4 h6 6.d4 d6
C54	Greco Variation, Italian	1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.c3 Nf6 5.d4 exd4 6.cxd4 Bb4+ 7.Nc3 Nxe4 8.O-O Nxc3
C33	Greco Variation, KGA	1.e4 e5 2.f4 exf4 3.Bc4 Qh4+ 4.Kf1 Bc5
C40	Greco Variation, Latvian	1.e4 e5 2.Nf3 f5 3.Nxe5 Qe7
D20	Greco Variation, QGA	1.d4 d5 2.c4 dxc4 3.e4 b5
C38	Greco; Calabrian Gambit, KGA	1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Bc4 Bg7 5.h4 h6 6.d4 d6 7.hxg5 hxg5 8.Rxh8 Rxh8 9.Nc3
C37	Greco-Lolli; Wild Muzio Gambit, KGA	1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Bc4 g4 5.Bxf7+
C39	Green; Kolisch Variation, KGA	1.e4 e5 2.f4 exf4 3.Nf3 g5 4.h4 g4 5.Ne5 d6
C53	Grevo Gambit, Italian	1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.c3 Nf6 5.d4 exd4 6.cxd4
A00	Grigorian Variation, Polish	1.b4 Nc6
C12	Grigoriev Variation, French	1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bg5 Bb4 5.e5 h6 6.exf6 hxg5 7.fxg7 Rg8 8.h4 gxh4 9.Qg4
B72	Grigoriev Variation, Sicilian	1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6 6.Be3 Bg7 7.Be2 Nc6 8.Qd2 O-O 9.O-O-O
C33	Grimm Attack, KGA	1.e4 e5 2.f4 exf4 3.Bc4 Qh4+ 4.Kf1 g5 5.Nc3 Bg7 6.d4 d6 7.e5
A53	Grinberg Gambit, Old Indian	1.d4 Nf6 2.c4 d6 3.Nc3 Bf5 4.e4
A00	Grob Gambit	1.g4 d5 2.Bg2 Bxg4
A00	Grob Gambit Declined	1.g4 d5 2.Bg2 c6
A00	Grob; Ahlhausen; Colibri; Fric; Genoa; Spike	1.g4
D00	Grosshans Defense, BDG	1.d4 d5 2.e4 dxe4 3.Nc3 Bd7
A00	Gruenfeld Defense, Dunst	1.Nc3 d5 2.e4 dxe4 3.Nxe4 e5
B01	Gruenfeld Variation, Center Counter	1.e4 d5 2.exd5 Qxd5 3.Nc3 Qa5 4.d4 Nf6 5.Nf3 Bf5 6.Ne5 c6 7.g4
D01	Grunfeld Defense, Veresov	1.d4 d5 2.Nc3 Nf6 3.Bg5 Nbd7 4.Nf3 g6
D80	Grunfeld Defense; D80	1.d4 Nf6 2.c4 g6 3.Nc3 d5
D32	Grunfeld Gambit, Tarrasch	1.d4 d5 2.c4 e6 3.Nc3 c5 4.cxd5 exd5 5.Nf3 Nc6 6.dxc5 d4 7.Na4 b5
D83	Grunfeld Gambit; D83	1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Bf4 Bg7 5.e3 O-O
E11	Grunfeld Variation, Bogo-Indian	1.d4 Nf6 2.c4 e6 3.Nf3 Bb4+ 4.Nbd2
D03	Grunfeld Variation, QP	1.d4 d5 2.Nf3 Nf6 3.Bg5 g6
B00	Guatemalan Defense	1.e4 b6 2.d4 Ba6
B01	Gubinsky-Melts Defense, Center Counter	1.e4 d5 2.exd5 Qxd5 3.Nc3 Qd6
B31	Gufeld Gambit, Sicilian	1.e4 c5 2.Nf3 Nc6 3.Bb5 g6 4.O-O Bg7 5.c3 e5 6.d4
C04	Guimard Variation, French	1.e4 e6 2.d4 d5 3.Nd2 Nc6 4.Ngf3 Nf6 5.e5 Nfd7
D00	Gunderam Attack, BDG	1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 Bf5 5.g4 Bg6 6.h4
D00	Gunderam Defense, BDG; Rook Pawn Defense	1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 exf3 5.Nxf3 h5
C40	Gunderam Gambit	1.e4 e5 2.Nf3 c6
C40	Gunderam Gambit	1.e4 e5 2.Nf3 Qe7 3.Bc4 f5
D31	Gunderam Gambit, Semi-Slav	1.d4 d5 2.c4 e6 3.Nc3 c6 4.e4 dxe4 5.f3
D00	Gunderam; Tartakower Var, BDG	1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 exf3 5.Nxf3 Bf5
D21	Gunsberg Defense, QGA	1.d4 d5 2.c4 dxc4 3.Nf3 c5
C45	Gunsberg Defense, Scotch	1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Nxd4 Bc5 5.Be3 Qf6 6.c3 Nge7 7.Bb5 Nd8
D20	Gunsberg Defense; Prianishenmo Gambit, QGA	1.d4 d5 2.c4 dxc4 3.Nc3 c5 4.d5 Nf6 5.Nc3 e6 6.e4 exd5 7.e5
C47	Gunsberg Variation, Four Kngiths	1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 4.a3
B06	Gurgenidze Defense, Modern Defense	1.e4 g6 2.d4 Bg7 3.Nc3 c6 4.f4 d5 5.e5 h5
B15	Gurgenidze System, Caro-Kann	1.e4 c6 2.d4 d5 3.Nc3 g6
B15	Gurgenidze Variation, Caro	1.e4 c6 2.d4 d5 3.Nc3 b5
B15	Gurgenidze Variation, Caro	1.e4 c6 2.d4 d5 3.Nc3 g6 4.e5 Bg7 5.f4 h5
B31	Gurgenidze Variation, Sicilian	1.e4 c5 2.Nf3 Nc6 3.Bb5 g6 4.O-O Bg7 5.Re1 e5 6.b4
B36	Gurgenidze Variation, Sicilian	1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 g6 5.c4 Nf6 6.Nc3 Nxd4 7.Qxd4 d6
D06	Gusev Countergambit, QGD	1.d4 d5 2.c4 c5 3.cxd5 Nf6
C03	Haberditz Variation, French	1.e4 e6 2.d4 d5 3.Nd2 f5
D22	Haberditz Variation, QGA	1.d4 d5 2.c4 dxc4 3.Nf3 a6 4.e3 b5
D06	Haberditz Variation, QGD	1.d4 d5 2.c4 c5 3.cxd5 Nf6 4.e4 Nxe4 5.dxc5 Qa5+
A43	Habichd; Hawk Variation, Benoni	1.d4 c5 2.d5 Nf6 3.Nf3 c4
B20	Halasz Gambit, Sicilian	1.e4 c5 2.d4 cxd4 3.f4
C40	Halasz-Jacobsen Gambit	1.e4 e5 2.Nf3 d5 3.exd5 Bd6
C21	Halasz-McDonnell Gambit	1.e4 e5 2.d4 exd4 3.f4
C50	Half Giuoco Piano; Semi-Italian Opening	1.e4 e5 2.Nf3 Nc6 3.Bc4 d6
A10	Halibut Gambit, English	1.c4 b5
C22	Hall Variation, Center	1.e4 e5 2.d4 exd4 3.Qxd4 Nc6 4.Qc4
C46	Halloween Gambit, Four Knights	1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 4.Nxe5
B00	Hammer Gambit, Nimzovich Defense	1.e4 Nc6 2.d4 e5 3.dxe5 f6
A00	Hammerschlag; Pork Chop Opening	1.f3 e5 2.Kf2
C25	Hamppe Meitner, Vienna	1.e4 e5 2.Nf3 Bc5 3.Na4
C25	Hamppe-Allgaier Gambit, Vienna	1.e4 e5 2.Nc3 Nc6 3.f4 exf4 4.Nf3 g5 5.h4 g4 6.Ng5
C25	Hamppe-Allgaier-Thorold Gambit	1.e4 e5 2.Nc3 Nc6 3.f4 exf4 4.Nf3 g5 5.h4 g4 6.Ng5 h6 7.Nxf7 Kxf7 8.d4
C25	Hamppe-Mietner Variation, Vienna	1.e4 e5 2.Nc3 Bc5 3.Na4
C25	Hamppe-Muzio Gambit, Vienna	1.e4 e5 2.Nc3 Nc6 3.f4 exf4 4.Nf3 g5 5.Bc4 g4 6.O-O
A00	Hanham; Hayward	1.c3 e5 2.Qc2
C41	Hanham; Lord Variation, Philidor	1.e4 e5 2.Nf3 d6 3.d4 Nd7
D00	Hans Mullers; Vienna V	1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 Bf5
C38	Hanstein Gambit, KGA	1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Bc4 Bg7 5.O-O
C60	Harding Gambit, Ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 d5 4.Nxe5 Qg5 5.Nxc6
C80	Harksen Gambit, Ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Nxe4 6.d4 b5 7.Bb3 d5 8.c4
D37	Harrwitz Attack, QGD	1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 Be7 5.Bf4
D35	Harrwitz; Rubinstein Var, QGD	1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bf4
A40	Hartlaub Gambit Accepted	1.d4 e6 2.c4 b6 3.Nc3 Bb7 4.e4 f5 5.exf5 Nf6
A40	Hartlaub Gambit Declined	1.d4 e6 2.c4 b6 3.Nc3 Bb7 4.e4 f5 5.d5
A40	Hartlaub Gambit, English	1.c4 b6 2.d4 Bb7 3.Nc3 e6 4.e4 f5 5.exf5 Nf6
A62	Hastings Defense, Benoni	1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.Nf3 g6 7.g3 Bg7 8.Bg2 O-O 9.O-O Nbd7
D30	Hastings Variation, QGD	1.d4 d5 2.c4 e6 3.Nf3 Nf6 4.Bg5 h6 5.Bxf6 Qxf6 6.Nc3 c6 7.Qb3
A43	Hawk Variation, Benoni	1.d4 c5 2.d5 Nf6 3.Nf3 e4
C30	Heath Variation, KGD; Rotlewi Countergambit	1.e4 e5 2.f4 Bc5 3.Nf3 d6 4.b4
B12	Hector Gambit, Caro	1.e4 c6 2.Nc3 d5 3.Nf3 dxe4 4.Ng5
A00	Hector Gambit, Dunst	1.Nc3 d5 2.e4 dxe4 3.Bc4
C66	Hedgehog Defense, Ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 Nf6 4.O-O d6 5.d4 Bd7 6.Nc3 Be7
E12	Hedgehog Variation, QID	1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.Nc3 Bb7 5.a3 g6
B41	Hedgehog Variation, Sicilian	1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 a6 5.c4 g6
A30	Hedgehog Variation, Symmetrical English	1.c4 c5 2.Nf3 Nf6 3.g3 b6 4.Bg2 Bb7 5.O-O e6 6.Nc3 Be7
A17	Hegehog System, Anglo-Indian English; A17	1.c4 Nf6 2.Nc3 e6
C51	Hein Countergambit, Evans	1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.b4 d5
B00	Hekili-Loa Gambit, Owen Defense	1.e4 b6 2.d4 c5 3.dxc5 Nc6
C11	Henneberger Variation, French	1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Be3
D63	Henneberger; Swiss Variation, QGD	1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 O-O 6.Nf3 Nbd7 7.Rc1 a6
D53	Heral Variation, QGD	1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.Bxf6
B00	Herford Gambit, Nimzovich Defense	1.e4 Nc6 2.d4 e5 3.dxe5 Qh4
A45	Hergert Gambit #1, Trompowsky	1.d4 Nf6 2.Bg5 Ne4 3.Bh4 d5 4.f3 Nf6 5.Nc3 Bf5 6.e4
A45	Hergert Gambit #2, Trompowsky	1.d4 Nf6 2.Bg5 Ne4 3.Bh4 c6 4.Nd2 Qa5 5.c3 Nxd2 6.Qxd2 d5 7.e4
A45	Hergert Gambit, Trompowsky	1.d4 Nf6 2.Bg5 Ne4 3.h4 Nxg5 4.hxg5 e5
A04	Herrstrom Gambit, Reti	1.Nf3 g5
C37	Herzfeld; Portuguese; Vienna, KGA	1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Bc4 g4 5.Ne5  Qh4+ 6.Kf1 Nc6
A80	Hevendehl Gambit, Dutch	1.d4 f5 2.g4 e5
A10	Hickmann Gambit, English	1.c4 f5 2.e4
A10	Hickmann Gambit, English	1.c4 f5 2.e4 fxe4 3.d3
B10	Hillbilly Attack, Caro-Kann	1.e4 c6 2.Bc4
C31	Hinrichsen Gambit, KGD	1.e4 e5 2.f4 d5 3.d4
B00	Hippopotamus Defense	1.e4 Nh6 2.d4 g6
A02	Hobbs Gambit, Bird	1.f4 g5
A02	Hobbs-Zilbermints Gambit, Bird	1.f4 h6 2.Nf3 g5
C01	Hoffman Gambit	1.e4 e6 2.d4 d5 3.Qe2 e5 4.f4 exf4
C37	Holloway Defense, KGA	1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Bc4 g4 5.O-O gxf3 6.Qxf3 Nc6
A80	Hopton Attack, Dutch	1.d4 f5 2.Bg5
B00	Hornung Gambit, Nimzovich Defense	1.e4 Nc6 2.d4 d5 3.Be3
C39	Horny Defense, KGA	1.e4 e5 2.f4 exf4 3.Nf3 g5 4.h4 g4 5.Ng5 h6 6.Nxf7 Kxf7 7.Qxg4 Nf6 8.Qxf4
A03	Horsefly Defense, Bird	1.f4 Nh6
A50	Horsefly Gambit	1.d4 Nf6 2.c4 Nc6 3.d5 Ne5 4.f4
C45	Horwitz Attack, Scotch	1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Nxd4 Qh4 5.Nb5
A40	Horwitz Defense	1.d4 e6
C23	Horwitz Gambit, Bishop	1.e4 e5 2.Bc4 Nf6 3.Nc3 b5
C81	Howell Attack, Ruy Lopez; C81	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Nxe4 6.d4 b5 7.Bb3 d5 8.dxe5 Be6 9.Qe2
A56	Hromadka Defense; Loose Gambit: A56	1.d4 Nf6 2.c4 c5
A56	Hromadka System, Benoni	1.d4 Nf6 2.c4 c5 3.d5 d6
C24	Hromadka Variation, Bishop	1.e4 e5 2.Bc4 Nf6 3.d3 Nc6 4.Nc3 Bb4 5.Ne2
D00	Hubsch Gambit	1.d4 d5 2.Nc3 Nf6 3.e4 Nxe4
E50	Huebner Deferred, Nimzo-Indian	1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Nf3 c5
E41	Huebner Variation, Nimzo-Indian	1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 c5 5.Bd3 Nc6 6.Nf3 Bxc3
E41	Huebner Variation, Nimzo-Indian; E41	1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 c5
A45	Huebsch Gambit	1.d4 Nf6 2.Nc3 d5 3.e4 Nxe4
A00	Hulsemann Gambit, Dunst	1.Nc3 e5 2.e3 d5 3.Qh5 Be6
A25	Hungarian Attack, English	1.c4 e5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 4.Rb1
D92	Hungarian Attack, Grunfeld; D92	1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.Bf4
C50	Hungarian Defense	1.e4 e5 2.Nf3 Nc6 3.Bc4 Be7
E00	Hungarian Gambit, Catalan	1.d4 Nf6 2.c4 e6 3.g3 e5
D97	Hungarian Variation, Grunfeld	1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.Qb3 dxc4 6.Qxc4 O-O 7.e4 a6
B02	Hunt Gambit, Alekhine; Two Pawn Attack	1.e4 Nf6 2.e5 Nd5 3.c4
B03	Hunt Variation, Alekhine	1.e4 Nf6 2.e5 Nd5 3.d4 d6 4.c4 Nb6 5.c5
A00	Hurst Attack, Grob	1.g4 e5 2.Bg2 d5 3.c4
B27	Hyperaccelerated Dragon, Sicilian	1.e4 c5 2.Nf3 g6
B27	Hyperaccelerated Pterodactyl, Sic	1.e4 c5 2.Nf3 g6 3.d4 Bg7
D70	Iago Defense	1.d4 Nf6 2.c4 Nc6
C17	Icelandic Defense, French	1.e4 e6 2.d4 d5 3.Nc3 Bb4 4.e5 c5 5.Bd2 Ne7 6.f4
B01	Icelandic-Palme Gambit, CC	1.e4 d5 2.exd5 Nf6 3.c4 e6
A81	Ilyin-Genevsky Variation, Dutch	1.d4 f5 2.g3 Nf6 3.Bg2 e6 4.Nf3 Be7 5.O-O O-O 6.c4 d6
A97	Ilyin-Zhenevsky Variation, Dutch; A97	1.d4 f5 2.c4 Nf6 3.g3 e6 4.Bg2 Be7 5.Nf3 O-O 6.O-O d6 7.Nc3 Qe8
A06	Improved Lisitsin G, Reti	1.Nf3 f5 2.d3
C66	Improved Steinitz Defense, Ruy Lopez; C66	1.e4 e5 2.Nf3 Nc6 3.Bb5 Nf6 4.O-O d6
A45	Indian Defense; A45	1.d4 Nf6
C20	Indian Opening	1.e4 e5 2.d3
A01	Indian Variation, Larsen	1.b3 Nf6
C45	Intermezzo Variation, Scotch	1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Nxd4 Bc5 5.Nxc6 Qf6
C44	Inverted Hanham Opening	1.e4 e5 2.Nf3 Nc6 3.Be2 Nf6 4.d3 d5 5.Nbd2
A00	Irish Attack; Polish Attack	1.Nc3 e5 2.f4
D00	Irish Gambit, QP	1.d4 d5 2.Nc3 c5
C50	Italian Four Knights Variation	1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.d3 Nf6 5.Nc3
C50	Italian Game; C50	1.e4 e5 2.Nf3 Nc6 3.Bc4
C46	Italian Variation, Four Knights	1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 4.Bc4
C50	Italian Variation, Four Knights Game	1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.Nc3 Nf6
C82	Italian Variation, Ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Nxe4 6.d4 b5 7.Bb3 d5 8.dxe5 Be6 9.c3 Bc5
B17	Ivanchuk Defense, Caro Kann	1.e4 c6 2.d4 d5 3.Nc3 dxe4 4.Nxe4 Nd7 5.Ng5 Ndf6
B63	Ivanov Variation, Sicilian	1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Bg5 e6 7.Qd2 Qb6
C41	Jaenisch Counter-Attack, Philidor; Nimzovich Variation	1.e4 e5 2.Nf3 d6 3.d4 Nf6
C44	Jaenisch Counterattack, Ponziani	1.e4 e5 2.Nf3 Nc6 3.c3 Nf6
C63	Jaenisch Gambit Accepted, Ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 f5 4.exf5
C70	Jaenisch Gambit Deferred, Ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 f5 5.exf5
C33	Jaenisch Variation, KGA	1.e4 e5 2.f4 exf4 3.Bc4 Qh4+ 4.Kf1 Nf6
C33	Jaenisch Variation, KGA	1.e4 e5 2.f4 exf4 3.Bc4 Qh4+ 4.Kf1 Qf6
C42	Jaenisch Variation, Petroff	1.e4 e5 2.Nf3 Nf6 3.Nxe5 d6 4.Nf3 Nxe4 5.d4 d5 6.Bd3 Be7 7.O-O Nc6 8.c4
C77	Jaffe Gambit, Ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.c3
B41	Jaffe Variation, Sicilian	1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Bb4 6.Bd3 e5
C40	Jalalabad Defense	1.e4 e5 2.Nf3 c5
B27	Jalalabad Variation, Sicilian	1.e4 c5 2.Nf3 e5
C49	Janowski Variation, Four Knights	1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 4.Bb5 Bb4 5.O-O O-O 6.d3 Bxc3 7.bxc3 d6 8.Re1
C12	Janowski Variation, French	1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bg5 Bb4 5.e5 h6 6.Be3
A53	Janowski Variation, Old Indian	1.d4 Nf6 2.c4 d6 3.Nc3 Bf5
D64	Janowski Variation, Orthodox Defense, QGD	1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 O-O 6.Nf3 Nbd7 7.Rc1 c6 8.Bd3 dxc4 9.Bxc4 Nd5 10.h4
D31	Janowski Variation, QGD	1.d4 d5 2.c4 e6 3.Nc3 a6
D07	Janowski Variation, QGD	1.d4 d5 2.c4 Nc6 3.Nc3 dxc4 4.Nf3
A80	Janzen-Korchnoi Gambit, Dutch	1.d4 f5 2.h3 Nf6 3.g4
C50	Jerome Gambit; Kentucky Opening	1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.Bxf7+
B02	John Tracy Gambit, Alekhine	1.e4 Nf6 2.Nf3
C56	Jordansky Attack, 2 Knights	1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.d4 exd4 5.O-O Nxe4 6.Re1 d5 7.Bxd5 Qxd5 8.Nc3 Qa5 9.Ne4 Be6 10.Bg5
B01	Kadas Gambit, Center Counter	1.e4 d5 2.exd5 Nf6 3.d4 c6 4.dxc6 e5
A00	Kadas Opening	1.h4
A20	Kahiko-Hula Gambit, English	1.c4 e5 2.e3 Nf6 4.f4 exf4 4.Nf3
B32	Kalashnikov Variation, Sicilian	1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 e5 5.Nb5 d6
D00	Kampars Gambit, BDG	1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 Bf5 5.g4 Bg6 6.g5 Nd5 7.fxe4
B20	Kan Formation, Smith-Morra Accepted, Sicilian	1.e4 c5 2.d4 cxd4 3.c3 dxc3 4.Nxc3 e6 5.Nf3 a6
B28	Kan Line, O'Kelly Sicilian	1.e4 c5 2.Nf3 a6 3.d4 cxd4 4.Nxd4 e6
C15	Kan Variation, French	1.e4 e6 2.d4 d5 3.Nc3 Bb4 4.Ne2 dxe4 5.a3 Bxc3+ 6.Nxc3 Nc6
A22	Kapengut; Smyslov; Modern V, English	1.c4 e5 2.Nc3 Nf6 3.g3 Bb4
C42	Karklins-Martinovsky Variation, Petroff	1.e4 e5 2.Nf3 Nf6 3.Nxe5 d6 4.Nd3
A00	Karniewski; Tubingen Variation, Polish	1.b4 Nh6
C80	Karpov Gambit, Ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Nxe4 6.d4 b5 7.Bb3 d5 8.dxe5 Be6 9.Nbd2 Nc5 10.c3 d4
B04	Karpov Variation, Alekhine	1.e4 Nf6 2.e5 Nd5 3.d4 d6 4.Nf3 g6 5.c4 Nb6 6.h3 Bg7 8.Be2
B17	Karpov Variation, Caro-Kann; B17	1.e4 c6 2.d4 d5 3.Nc3 dxe4 4.Nxe4 Nd7
B17	Kasparov Attack, Caro-Kann	1.e4 c6 2.d4 d5 3.Nc3 dxe4 4.Nxe4 Nd7 5.Nf3 Ngf6 6.Ng3
E12	Kasparov Variation, QID	1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.Nc3
E12	Kasparov-Petrosian Variation, QID	1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.Nc3 Bb7 5.a3
B27	Katalimov Variation, Sicilian	1.e4 c5 2.Nf3 b6
C42	Kaufmann Variation, Petroff	1.e4 e5 2.Nf3 Nf6 3.Nxe5 d6 4.Nf3 Nxe4 5.c4
C65	Kaufmann Variation, Ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 Nf6 4.d3 Bc5 5.Be3
C29	Kaufmann Variation, Vienna	1.e4 e5 2.Nc3 Nf6 3.f4 d5 4.fxe5 Nxe4 5.Nf3 Bg4 6.Qe2
D00	Kaulich Variation, BDG	1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 exf3 5.Nxf3 c5
E62	Kavalek Defense, KID	1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.Nf3 d6 5.g3 O-O 6.Bg2 c6 7.O-O Qa5
E91	Kazakh Variation, KID	1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 O-O 6.Na6
C87	Kecskemet; Timbuktu Var, Ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 d6 7.c3 O-O 8.d4 Bd7 9.Nbd2 Be8
A00	Keene Defense, Grob	1.g4 d5 2.h3 e5
A00	Keene Defense, Grob	1.g4 d5 2.h3 e5 3.Bg2 c6
C30	Keene Defense, KGD	1.e4 e5 2.f4 Qh4+ 3.g3 Qe7
A28	Keene; Stean Variation, English	1.c4 e5 2.Nc3 Nc6 3.Nf3 Nf6 4.e3 Bb4 5.Qc2 O-O 6.Nd5 Re8 7.Qf5
C24	Keidansky Gambit, Bishop	1.e4 e5 2.Bc4 Nf6 3.d4 exd4 4.Nf3 Nxe4 5.Qxd4
E60	Kemeri Variation	1.d4 Nf6 2.c4 g6 3.g3 Bg7 4.Bg2 d5 5.cxd5 Nxd5 6.Nf3 O-O 7.O-O c5
D85	Kemeri Variation, Grunfeld	1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.cxd5 Nxd5 5.g3
D80	Kemeri Variation, Grunfeld	1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.g3
D70	Kemeri; Neo-Grunfeld	1.d4 Nf6 2.c4 g6 3.g3 d5
B00	Kennedy Variation, Nimzovich	1.e4 Nc6 2.d4 e5
A00	Keoni-Hiva Gambit	1.e3 d5 2.Nc3 Nf6 3.a3 e5 4.f4 exf4 5.Nf3
B00	Keres Attack, Nimzovich Defense	1.e4 Nc6 2.d4 e5 3.dxe5 Nxe5 4.Nc3
A21	Keres Defense, English	1.c4 e5 2.Nc3 d6 3.g3 c6
A14	Keres Defense, English	1.c4 e6 2.Nf3 d5 3.g3 Nf6 4.Bg2 Be7 5.O-O c5 6.cxd5 Nxd5 7.Nc3 Nc6
A40	Keres Defense, Indian; Kangaroo Defense	1.d4 e6 2.c4 Bb4+
E33	Keres Defense, Nimzo-Indian	1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Qc2 O-O 5.a3 Bxc3+ 6.Qxc3 b6
C92	Keres Defense, Ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 d6 8.c3 O-O 9.h3 Nd7
A00	Keres Gambit, Grob	1.g4 d5 2.Bg2 c6 3.c4 dxc4 4.c3
B04	Keres Variation, Alekhine	1.e4 Nf6 2.e5 Nd5 3.d4 d6 4.Nf3 g6 5.Bc4 Nb6 6.Bb3 Bg7 7.a4
A23	Keres Variation, English; A23	1.c4 e5 2.Nc3 Nf6 3.g3 c6
D98	Keres Variation, Grunfeld	1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.Qb3 dxc4 6.Qxc4 O-O 7.e4 Bg4 8.Be2 Nfd7 9.Be2 Nb6 10.Qd3 Nc6 11.O-O-O Qc8
C32	Keres Variation, KGD	1.e4 e5 2.f4 d5 3.exd5 e4 4.d3 Nf6 5.Nd2
A07	Keres Variation, KIA	1.Nf3 d5 2.g3 Bg4 3.Bg2 Nd7
E93	Keres Variation, KID	1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 O-O 6.Be2 e5 7.d5 Nbd7 8.Bg5 h6 9.Bh4 g5 10.Bg3 Nh5 11.h4
E25	Keres Variation, Nimzo-Indian	1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.a3 Bxc3+ 5.bxc3 c5 6.f3 d5 7.cxd5 Nxd5 8.dxc5
E40	Keres Variation, Nimzo-Indian	1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 d5 5.a3 Bxc3+ 6.bxc3 c5 7.cxd5 exd5 8.Bd3 O-O 9.Ne2 b6
E53	Keres Variation, Nimzo-Indian	1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Nf3 d5 6.Bd3 c5 7.O-O b6
C71	Keres Variation, Ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 d6 5.c4
C92	Keres Variation, Ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 d6 8.c3 O-O 9.h3 a5
C96	Keres Variation, Ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 d6 8.c3 O-O 9.h3 Na5 10.Bc2 c5 11.d4 Nd7
C68	Keres Variation, Ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Bxc6 bxc6 5.Nc3
C33	Keres, Mason, Parnu, Requena	1.e4 e5 2.f4 exf4 3.Nc3
B20	Keres; Billium Attack, Sicilian; Chameleon	1.e4 c5 2.Ne2
C81	Keres; Estonian; Howell; Moscow Var	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Nxe4 6.d4 b5 7.Bb3 d5 8.dxe5 Be6
B81	Keres; Panov Variation, Sicilian; B81	1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e6 6.g4
A34	Keres-Parma System, English	1.c4 c5 2.Nc3 Nf6 3.Nf3 e6 4.g3 Nc6
A18	Kevitz Defense, English	1.c4 Nf6 2.Nc3 e6 3.e4 Nc6
C89	Kevitz Variation, Ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 O-O 8.c3 d5 9.exd5 Nxd5 10.Nxe5 Nxe5 11.Rxe5 c6 12.Bxd5 cxd5 13.d4 Bd6 14.Re3
C23	Khan Gambit, Bishop	1.e4 e5 2.Bc4 d5
C42	Kholmov Gambit, Petroff	1.e4 e5 2.Nf3 Nf6 3.Nxe5 Nxe4 4.Qe2 Qe7
B07	Kholmov System, Pirc	1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.Bc4
C92	Kholmov Variation, Ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 d6 8.c3 O-O 9.h3 Be6
C20	Kiddie Countergambit	1.e4 e5 2.Qh5 Nf6
B01	Kiel Variation, Center Counter	1.e4 d5 2.exd5 Nf6 3.d4 Nxd5 4.c4 Nb4
C33	Kieseritzky Gambit, Bishop's Gambit, KGA	1.e4 e5 2.f4 exf4 3.Bc4 b5
C39	Kieseritzky Gambit, KGA	1.e4 e5 2.f4 exf4 3.Nf3 g5 4.h4 g4 5.Ne5
B28	Kieseritzky System, Sicilian	1.e4 c5 2.Nf3 a6 3.b3
C58	Kieseritzky; Morphy Var, 2 Knights	1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.Ng5 d5 5.exd5 Na5 6.d3
B20	King David's Opening	1.e4 c5 2.Ke2
C20	King Pawn Game; C20	1.e4 e5
A65	King Pawn lines, Benoni; A65	1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.e4
A59	King Walk Variation, Benko Gambit	1.d4 Nf6 2.c4 c5 3.d5 b5 4.cxb5 a6 5.bxa6 Bxa6 6.Nc3 d6 7.e4 Bxf1 8.Kxf1 g6 9.g3 Bg7 10.Kg2 O-O
C00	King"s Indian Attack	1.e4 e6 2.d3
A80	Kingfisher Gambit, Dutch	1.d4 f5 2.Nc3 d5 3.e4
C68	King's Bishop Variation, Ruy Lopez Exchange	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Bxc6 dxc6 5.O-O Bd6
A20	King's English; A20	1.c4 e5
C33	King's Gambit Accepted; C33	1.e4 e5 2.f4 exf4
C20	King's Gambit Reversed	1.e4 e5 2.d3 f5
C23	King's Gambit Reversed, Bishop	1.e4 e5 2.Bc4 f5
C30	King's Gambit; C30	1.e4 e5 2.f4
C20	King's Head	1.e4 e5 2.f3
C20	King's Head Opening	1.e4 e5 2.f3 Nf6 3.Nc3
A00	King's Head Opening	1.f3 e5 2.e4
A05	King's Indian Attack; Reti; Zukertort; A05	1.Nf3 Nf6
D70	King's Indian Defense; West Indian Defense; D70	1.d4 Nf6 2.c4 g6
E60	King's Indian Defense; West Indian Defense; E60	1.d4 Nf6 2.c4 g6
A56	King's Indian System, Benoni	1.d4 Nf6 2.c4 c5 3.d5 e5 4.Nc3 d6 5.e4 g6
A48	King's Indian Variation	1.d4 Nf6 2.Nf3 g6 3.e3 Bg7 4.Bd3 d6
C34	King's Knight Gambit, KGA; C34	1.e4 e5 2.f4 exf4 3.Nf3
C40	King's Knight Opening; C40	1.e4 e5 2.Nf3
A13	King's Knight Variation, English	1.c4 e6 2.Nf3 d5
A15	King's Knight Variation, English	1.c4 Nf6 2.Nf3
E60	King's Knight Variation, KID	1.d4 Nf6 2.c4 g6 3.Nf3
A43	Kingside move order, Benoni	1.d4 c5 2.d5 Nf6 3.Nf3
C24	Kitchner Folly, Bishop	1.e4 e5 2.Bc4 Nf6 3.d3 Be7 4.Nf3 O-O
C41	Klein Variation, Philidor	1.e4 e5 2.Nf3 d6 3.d4 Nf6 4.Bc4
C37	Kling & Horwitz Counter-Attack, KGA	1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Bc4 g4 5.O-O Qe7
D00	Kloss Attack, BDG	1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 exf3 5.Nxf3 g6 6.Bc4 Bg7 7.O-O O-O 8.Kh1
C57	Kloss Gambit, Two Knights	1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.Ng5 d5 5.exd5 Nb4
A00	Kluever Gambit, Dunst	1.Nf3 f5 2.e4 fxe4 3.d3
B02	Kmoch Variation, Alekhine	1.e4 Nf6 2.e5 Nd5 3.Bc4 Nb6 4.Bb3 c5 5.d3
E20	Kmoch Variation, Nimzo-Indian	1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.f3
D51	Knight Defense, QGD; D51	1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Nbd7
B15	Knight Variation, Caro	1.e4 c6 2.d4 d5 3.Nc3 dxe4 4.Nxe4 Nf6
C00	Knight Variation, French	1.e4 e6 2.Nf3
C25	Knight Variation, Vienna	1.e4 e5 2.Nc3 Nc6 3.f4 exf4 4.Nf3
A46	Knights Variation, Indian Game; A46	1.d4 Nf6 2.Nf3
C80	Knoore Variation, Ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Nxe4 6.Nc3
B41	Koch Variation, Sicilian	1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Bb4 6.e5
C37	Koch; Ghulam Kassim Gambit, KGA	1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Bc4 g4 5.d4
C15	Kondratiyev Variation, French	1.e4 e6 2.d4 d5 3.Nc3 Bb4 4.Bd3 c5 5.exd5 Qxd5 6.Bd2
C64	Konikowski Gambit, Ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 Bc5 4.c3 d5
C44	Konstantinopolsky Opening	1.e4 e5 2.Nf3 Nc6 3.g3
A00	Koola-Koola	1.h4 a5
C74	Kopaiev Variation, Ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 d6 5.c3 f5 6.exf5 Bxf5 7.O-O
B50	Kopec System, Sicilian	1.e4 c5 2.Nf3 d6 3.Bd3
E97	Korchnoi Attack, KID	1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 O-O 6.Be2 e5 7.O-O Nc6 8.d5 Ne7 9.Bd2
B23	Korchnoi Defense, Sicilian	1.e4 c5 2.Nc3 e6 3.g3 d5
D20	Korchnoi Gambit, QGA	1.d4 d5 2.c4 dxc4 3.e3 e5 4.Bc4 exd4 5.Qb3 Qe7 6.Kf1
A28	Korchnoi Line, English	1.c4 e5 2.Nc3 Nc6 3.Nf3 Nf6 4.a3
E21	Korchnoi Variation, Nimzo-Indian	1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Nf3 c5 5.d5
A80	Korchnoi's Variation, Dutch	1.d4 f5 2.h3
A16	Korchnoi's Variation, English	1.c4 Nf6 2.Nc3 d5 3.cxd5 Nxd5 4.Nf3 g6 5.g3 Bg7 6.Bg2 e5
A52	Kornl Richter Gambit, Budapest	1.d4 Nf6 2.c4 e5 3.dxe5 Ng4 4.Bf4 Nc6 5.Nf3 Bb4+ 6.Nc3 Bxc3+
C63	Kostic Defense, Ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 f5 4.Nc3 fxe4 5.Nxe4 Be7
C63	Kostic Variation, Ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 f5 4.Nc3 Nf6 5.exf5 Bc5
C37	Kotov Gambit	1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Bc4 g4 5.d4 gxf3 6.Bxf4
B50	Kotov Gambit, Sicilian	1.e4 c5 2.Nf3 d6 3.g3 b5
A40	Kotov Variation, Modern	1.d4 g6 2.c4 Bg7 3.Nc3 d6 4.e4 Nc6
A40	Kotov-Robatsch Defense	1.d4 g6 2.c4 Bg7
E98	Kozul Gambit, KID	1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 O-O 6.Be2 e5 7.O-O Nc6 8.d5 Ne7 9.Ne1 Nd7 10.Be3 f5
E70	Kramer Variation, KID	1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.Nf3 d6 5.Nge2
E17	Kramnik Variation, QID	1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3 Bb7 5.Bg2 Be7 6.O-O O-O 7.Re1
B40	Kramnik Variation, Sicilian	1.e4 c5 2.Nf3 e6 3.c4
D85	Kramnik's Line, Grunfeld	1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.cxd5 Nxd5 5.e4 Nxc3 6.bxc3 Bg7 7.Nf3 c5 8.h3
A21	Kramnik-Shirov Variation, English	1.c4 e5 2.Nc3 Bb4
D17	Krause Attack, Slav	1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 dxc4 5.a4 Bf5 6.Ne5
C47	Krause Gambit, Four Knights	1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 4.d4 Bb4 5.Nxe5
A84	Krause Variation, Dutch	1.d4 f5 2.c4 Nf6 3.Nc3 d6 4.Nf3 Nc6
C41	Krause Variation, Philidor	1.e4 e5 2.Nf3 d6 3.d4 Nd7 4.Bc4 c6 5.O-O
A45	Kraus-Muhlherr Counter Gambit	1.d4 Nf6 2.f3 d5 3.e4 e5 4.dxe5 Nxe4
C23	Kreijcik Gambit, Bishop	1.e4 e5 2.Bc4 Nf6 3.f3 Bc5 4.Ne2 Nc6 5.b4
C20	Krejcik Gambit	1.e4 e5 2.f3 Nf6 3.Bc4 Bc5 4.Ne2 Nc6 5.b4
B02	Krejcik Variation, Alekhine	1.e4 Nf6 2.Bc4
C15	Kunin Double Gambit, French	1.e4 e6 2.d4 d5 3.Nc3 Bb4 4.Bd2 dxe4 5.Qg4 Qxd4
C22	Kupreichik Variation, Center	1.e4 e5 2.d4 exd4 3.Qxd4 Nc6 4.Qe3 Nf6 5.Nc3 Bb4 6.Bd2 O-O 7.O-O-O Re8 8.Bc4
B56	Kupreichik Variation, Sicilian	1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Bd7
A13	Kurajica Defense, English	1.c4 e6 2.Nf3 d5 3.g3 c6
B09	Kurajica Variation, Pirc	1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.f4 Bg7 5.Nf3 O-O 6.Be3
C57	Kurkin Gambit, Two Knights	1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.Ng5 d5 5.exd5 b5 6.Bf1 h6 7.Nxf7
B40	Kveinis Variation, Sicilian	1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Qb6
C40	Labourdonnais Gambit	1.e4 e5 2.Nf3 Qf6 3.Bc4 Qg6 4.O-O
C53	Labourdonnais Variation, Italian	1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.c3 d6 5.d4 exd4 6.cxd4 Bb6
C23	Labourdonnais-Denker Gambit, Bishop	1.e4 e5 2.Bc4 Bc5 3.b4 Bxb4 4.c3
D00	Lamb Defense, BDG	1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 Nc6
C21	Lanc-Arnold Gambit, Center	1.e4 e5 2.d4 exd4 3.Nf3 Bc5 4.c3
B12	Landau Gambit, Caro-Kann	1.e4 c6 2.d4 d5 3.Bd3 Nf6 4.e5 Nfd7 6.e6
D12	Landau Variation, Slav	1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.e3 Bf5 5.cxd5 cxd5 6.Qb3 Qc8 7.Bd2 e6 8.Na3
D00	Lange Gambit; Alfred Lange Gambit; Simple Variation	1.d4 d5 2.e4 dxe4 3.Nc3 e5 4.Nxe4
C51	Lange Variation, Evans Gambit	1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.b4 Bb6 5.b5 Na5 6.Nxe5 Nh6
D00	Langeheinecke Variation, BDG	1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 e3
A02	Langheld Gambit, Bird	1.f4 e5 2.fxe5 d6 3.exd6 Nf6
C41	Larobok Variation, Philidor	1.e4 e5 2.Nf3 d6 3.d4 Nf6 4.Nc3 Nbd7
A00	Laroche Gambit, Dunst	1.Nc3 b5
E62	Larsen Defense, KID	1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.Nf3 d6 5.g3 O-O 6.Bg2 c6 7.O-O Bf5
B20	Larsen Defense, Smith-Morra Accepted, Sicilian	1.e4 c5 2.d4 cxd4 3.c3 dxc3 4.Nxc3 Nc6 5.Nf3 e6 6.Bc4 a6 7.O-O Qc7 8.Qe2 Bd6
B04	Larsen Variation, Alekhine	1.e4 Nf6 2.e5 Nd5 3.d4 d6 4.Nf3 dxe5
D86	Larsen Variation, Grunfeld	1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.cxd5 Nxd5 5.e4 Nxc3 6.bxc3 Bg7 7.Bc4 O-O 8.Ne2 Qd7
D86	Larsen Variation, Grunfeld	1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.cxd5 Nxd5 5.e4 Nxc3 6.bxc3 Bg7 7.Bc4 O-O 8.Ne2 Qd7 9.O-O b6
E90	Larsen Variation, KID	1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 O-O 6.Be3
C41	Larsen Variation, Philidor	1.e4 e5 2.Nf3 d6 3.d4 exd4 4.Nxd4 g6
D47	Larsen Variation, Semi-Slav	1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.e3 Nbd7 6.Bd3 dxc4 7.Bxc4 b5 8.Bd3 Bb7 9.e4 b4 10.Na4 c5
D25	Larsen; Janowski; Modern Variation, QGA	1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.e3 Bg4
A01	Larsen; Queen's Fianchetto; Nimzo-Larsen Attack A01	1.b3
B21	Larsen-Santasiere (McDonnell Attack) Variation, Sicilian; B21	1.e4 c5 2.f4
C20	Lasa Gambit	1.e4 e5 2.c3 f5
C52	Lasker Defense, Evans	1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.b4 Bxb4 5.c3 Ba5 6.d4 d6 7.O-O Bb6
D53	Lasker Defense, QGD	1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 Ne4
A02	Lasker Gambit, Bird	1.f4 e5 2.fxe5 f6
A00	Lasker Simul Special	1.g3 h5
D08	Lasker Trap, QGD	1.d4 d5 2.c4 e5 3.dxe5 d4 4.e3 Bb4+ 5.Bd2 dxe3
B02	Lasker Variation, Alekhine	1.e4 Nf6 2.e5 Nd5 3.c4 Nb6 4.c5
A02	Lasker Variation, Bird	1.f4 e5 2.fxe5 d6 3.exd6 Bxd6 4.Nf3 g5
B01	Lasker Variation, Center Counter	1.e4 d5 2.exd5 Qxd5 3.Nc3 Qa5 4.d4 Nf6 5.Nf3 Bg4 6.h3
A83	Lasker Variation, Dutch	1.d4 f5 2.e4 fxe4 3.Nc3 Nf6 4.Bg5 g6 5.f3
C12	Lasker Variation, French	1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bg5 Bb4 5.e5 h6 6.Bd2 Bxc3
C42	Lasker Variation, Petroff	1.e4 e5 2.Nf3 Nf6 3.Nxe5 d6 4.Nf3 Nxe4 5.Qe2
D56	Lasker Variation, QGD	1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 O-O 6.Nf3 h6 7.Bh4 Ne4 8.Bxe7 Qxe7
B33	Lasker-Pelikan Variation, Sicilian	1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e5
C40	Latvian Gambit Accepted	1.e4 e5 2.Nf3 f5 3.exf5
C40	Latvian; Greco Counter-Gambit	1.e4 e5 2.Nf3 f5
D06	Lazard Gambit, Chigorin Defense	1.d4 d5 2.c4 Nc6 3.Nf3 e5
A45	Lazard Gambit; Maddigan Gambit	1.d4 Nf6 2.Nd2 e5
B53	Lazy Knight Variation, Sicilian	1.e4 c5 2.Nf3 d6 3.d4 Nd7
D70	Leko Gambit	1.d4 Nf6 2.c4 g6 3.f3 e5
A05	Lemberg Gambit, Zukertort	1.Nf3 Nf6 2.e4
D00	Lemberger Counter-Gambit, BDG	1.d4 d5 2.e4 dxe4 3.Nc3 e5
B00	Lemming Defense	1.e4 Na6
A86	Leningrad Variation, Dutch	1.d4 f5 2.c4 Nf6 3.g3 g6
C04	Leningrad Variation, French	1.e4 e6 2.d4 d5 3.Nd2 Nc6 4.Ngf3 Nf6 5.e5 Nfd7 5.f4 c5 6.c3 Nc6 7.Ndf3 cxd4 8.cxd4
E30	Leningrad Variation, Nimzo-Indian; E30	1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Bg5
C33	Leonardo (Stamma) Gambit, KGA	1.e4 e5 2.f4 exf4 3.h4
B01	Leonhardt (Rosen) Gambit, Center Counter	1.e4 d5 2.exd5 Qxd5 3.Nc3 Qa5 4.b4
C47	Leonhardt Defense, Four Knights	1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 4.d4 Bb4 5.Nxe5 Qe7
C52	Leonhardt Variation, Evans	1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.b4 Bxb4 5.c3 Ba5 6.d4 b5
C40	Leonhardt Variation, Latvian	1.e4 e5 2.Nf3 f5 3.Nxe5 Qf6 4.Nc4 fxe4 5.Nc3
C44	Leonhardt Variation, Ponziani	1.e4 e5 2.Nf3 Nc6 3.c3 d5 4.Qa4 Nf6
C90	Leonhardt Variation, Ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 O-O 8.c3 Na5 9.Bc2 c5 10.d4 Qc7 11.h3 Nc6 12.d5 Nd8 13.Nbd2 g5
B88	Leonhardt Variation, Sicilian; B88	1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e6 6.Bc4 Nc6
C33	Lesser Bishop; Tartakower	1.e4 e5 2.f4 exf4 3.Be2
E62	Lesser Simagin (Spassky) Variation, KID	1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.Nf3 d6 5.g3 O-O 6.Bg2 Nc6 7.O-O Bf5
A04	Lessing Defense; Black Mustang Defense	1.Nf3 Nc6
D97	Levenfish Variation, Grunfeld	1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.Qb3 dxc4 6.Qxc4 O-O 7.e4 b6
B71	Levenfish Variation, Sicilian; B71	1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6 6.f4
C40	Levenstein; Queen's Defense; Brazilian; Gunderam	1.e4 e5 2.Nf3 Qe7
C23	Lewis Countergambit, Bishop	1.e4 e5 2.Bc4 Bc5 3.c3 d5 4.Bxd5 Nf6
C23	Lewis Counter-Gambit, Bishop	1.e4 e5 2.Bc4 Bc5 3.c3 d5
C53	Lewis Defense, Italian; Closed Variation	1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.c3 Qe7
C23	Lewis Gambit, Bishop	1.e4 e5 2.Bc4 Bc5 3.d4
C67	L'Hermet Variation, Ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 Nf6 4.O-O Nxe4 5.d4 Nd6
C42	Lichtenhein Defense, Petroff	1.e4 e5 2.Nf3 Nf6 3.Bc4 Nxe4 4.Nc3 d5
A00	Liebig Gambit, Dunst	1.Nc3 e5 2.e3 d5 3.Qh5 Nf6
D44	Lilienthal Variation, Semi-Slav	1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.Bg5 dxc4 6.e4 b5 7.e5 h6 8.Bh4 g5 9.Nxg5 hxg5 10.Bxg5 Nbd7
D20	Linares Variation, QGA	1.d4 d5 2.c4 dxc4 3.e4 c5 4.d5 Nf6 5.Nc3 b5
A45	Linder Counter Gambit	1.d4 Nf6 2.f3 e6 3.e4 Nxe4
B00	Linksspringer Variation, Nimzovich Defense	1.e4 Nc6 2.d4 e5 3.d5
C41	Lion Variation, Philidor	1.e4 e5 2.Nf3 d6 3.d4 Nd7 4.Nc3 Nf6
B07	Lion's Jaw, Pirc	1.e4 d6 2.d4 Nf6 3.f3
B90	Lipnitzky Variation, Sicilian	1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Bc4
A42	Lisbon Gambit	1.d4 d6 2.c4 e5 3.dxe5 Nc6
A80	Lisbon Gambit, Dutch; Krejcik Gambit	1.d4 f5 2.g4
A06	Lisitsin Gambit Deferred, Zukertort	1.Nf3 f5 2.d3 Nf6 3.e4
A04	Lisitsin Gambit; Polish Gambit	1.Nf3 f5 2.e4
A40	Lithuanian Variation, Mikenas	1.d4 Nc6 2.c4 e5 3.d5 Nce7
A40	Lizard Defense; Pirc-Diemer Gambit	1.d4 g6 2.h4 Nf6 3.h5
B28	Ljubojevic Line, Sicilian	1.e4 c5 2.Nf3 a6 3.c3 b5
B09	Ljubojevic Variation, Pirc	1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.f4 Bg7 5.Bc4
C40	Lobster Gambit, Latvian	1.e4 e5 2.Nf3 f5 3.g4
C41	Locock Variation, Philidor	1.e4 e5 2.Nf3 d6 3.d4 Nf6 4.Ng5 h6 5.Nxf7
D33	Lodz; Schlecter; Rubinstein Var, QGD; D33	1.d4 d5 2.c4 e6 3.Nc3 c5 4.cxd5 exd5 5.Nf3 Nc6 6.g3
A10	Loehn Gambit, English	1.c4 d5 2.cxd5 e6
C57	Lolli Attack, 2 Knights	1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.Ng5 d5 5.exd5 Nxd5 6.d4
C44	Lolli Attack, Scotch	1.e4 e5 2.Nf3 Nc6 3.d4 Nxd4
C56	Loman Defense, 2 Knights	1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.d4 exd4 5.O-O Bc5 6.e5 d5 7.exf6 dxc4 8.Re1+ Be6 9.Ng5 g6
A00	London Defense, Grob	1.g4 e5 2.h3 Nc6
C44	London Defense, Scotch	1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Bc4 Bb4+
A46	London System	1.d4 Nf6 2.Nf3 e6 3.Bf4
A48	London System, Torre Attack	1.d4 Nf6 2.Nf3 g6 3.Bf4
D02	London System; Queen's Bishop Opening	1.d4 d5 2.Nf3 Nf6 3.Bf4
A09	London V; New York V, Reti	1.Nf3 d5 2.c4 c6 3.b3 Nf6 4.Bb2 Bf5
A48	London Variation	1.d4 Nf6 2.Nf3 g6 3.Bf4 Bg7 4.Nbd2
C39	Long Whip Variation, KGA	1.e4 e5 2.f4 exf4 3.Nf3 g5 4.h4 g4 5.Ne5 h5
C41	Lopez Counter-Gambit, Philidor	1.e4 e5 2.Nf3 d6 3.Bc4 f5
C33	Lopez Defense, KGA	1.e4 e5 2.f4 exf4 3.Bc4 c6
C84	Lopez Four Knights, Ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Nc3
C23	Lopez Gambit, Bishop	1.e4 e5 2.Bc4 Bc5 3.Qe2 Nf6 4.f4
C23	Lopez Variation, Bishop	1.e4 e5 2.Bc4 Bc5 3.Qe2
B58	Louma Variation, Sicilian	1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Be2 e5 7.Nxc6
C02	Lputian Variation, French	1.e4 e6 2.d4 d5 3.e5 c5 4.c3 Nc6 5.Nf3 Qb6 6.a3 Nh6
C50	Lucchini Gambit; Italian	1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.d3 f5
C60	Lucena Defense, Ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 Be7
A40	Lundin Defense	1.d4 Nc6
D80	Lundin Variation, Grunfeld	1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Bg5 Ne4 5.Nxe4 dxc3 6.Qd2 c5
A56	Lundin; Bronstein Counter-Gambit	1.d4 Nf6 2.c4 c5 3.d5 d6 4.Nc3 g6 5.e4 b5
D47	Lundin; Neo-Meran	1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.e3 Nbd7 6.Bd3 dxc4 7.Bxc4 b5 8.Bd3 b4
B31	Lutikov Gambit, Sicilian	1.e4 c5 2.Nf3 Nc6 3.Bb5 g6 4.O-O Bg7 5.c3 Nf6 6.d4
D70	Lutikov Variation, Grunfeld	1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.f3
C90	Lutikov Variation, Ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 d6 8.c3 O-O 9.Bc2
C90	Lutikov Variation, Ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 O-O 8.c3 d6 9.Bd2
C68	Lutikov Variation, Ruy Lopez Exchange	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Bxc6 bxc6
C33	MacDonnell Attack, KGA	1.e4 e5 2.f4 exf4 3.Bc4 Qh4+ 4.Kf1 g5 5.Nc3 Bg7 6.d4 Ne7 7.g3
C23	MacDonnell Gambit, Bishop	1.e4 e5 2.Bc4 Bc5 3.b4
C37	MacDonnell Gambit, KGA	1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Bc4 g4 5.Nc3
C77	Mackenzie Variation, Ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.d4
C20	Macleod Attack	1.e4 e5 2.c3
C34	MacLeod Defense, KGA	1.e4 e5 2.f4 exf4 3.Nf3 Nc6
C44	MacLopez; Relfsson Gambit, Scotch	1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Bb5
D00	Mad Dog Attack, BDG	1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 exf3 5.Nxf3 g6 6.Bc4 Bg7 7.h4
A45	Maddigan Gambit	1.d4 Nf6 2.Nc3 e5
C30	Mafia Defense, KGD	1.e4 e5 2.f4 c5
C40	Mail Line, Latvian Gambit Accepted	1.e4 e5 2.Nf3 f5 3.Nxe5 Qf6 4.d4
A57	Main Line, Benko Gambit Declined	1.d4 Nf6 2.c4 c5 3.d5 b5 4.Nf3
B52	Main Line, Canal Attack, Sicilian; B52	1.e4 c5 2.Nf3 d6 3.Bb5+ Bd7
D19	Main Line, Czech Variation, Slav; D19	1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 dxc4 5.a4 Bf5 6.e3 e6 7.Bxc4 Bb4 8.O-O O-O 9.Qe2
C52	Main Line, Evans Gambit; C52	1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.b4 Bxb4 5.c3 Ba5
D80	Makogonov Variation, Grunfeld	1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.e3 Bg7 5.Nf3 O-O 6.b4
D94	Makogonov Variation, Grunfeld	1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.e3 O-O 6.b4
E71	Makogonov Variation, KID; E71	1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.h3
C45	Malaniuk Variation, Scotch	1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Nxd4 Bb4+
A45	Malich Gambit	1.d4 Nf6 2.Nc3 d5 3.Bg5 c5 4.Bxf6 gxf6 5.e4 dxe4 6.d5
C83	Malkin Variation, Ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Nxe4 6.d4 b5 7.Bb3 d5 8.dxe5
A45	Maltese Falcon	1.d4 Nf6 2.g4 Nxg4 3.f3 Nf6 4.e4
A10	Malvinas Variation, English	1.c4 d5 2.cxd5 Qxd5 3.Nc3 Qa5
A80	Manhattan Gambit, Dutch	1.d4 f5 2.Qd3 Nf6 3.g4
D51	Manhattan; Westphalia Variation, QGD	1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Nbd7 5.e3 Bb4
D23	Mannheim Variation, QGA	1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.Qa4+
B00	Mao Tse Tung; Duras	1.e4 f5
D18	Mareschall Variation, Slav; Lasker Variation	1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 dxc4 5.a4 Bf5 6.e3 Na6
B62	Margate (Vitolins) Variation, Sicilian	1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Bg5 e6 7.Bb5
A47	Marienbad Variation	1.d4 Nf6 2.Nf3 b6 3.g3 Bb7 4.Bg2 c5
B20	Marienbad Variation, Sicilian	1.e4 c5 2.b4 cxb4 3.a3 d5 4.exd5 Qxd5 5.Bb2
C25	Mariotti Gambit	1.e4 e5 2.Nc3 Nc6 3.g3 Bc5 4.Bg2 h5 5.Nf3 h4
B28	Maroczy Bind, O'Kelly Sicilian	1.e4 c5 2.Nf3 a6 3.c4
B36	Maroczy Bind, Sicilian; B36	1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 g6 5.c4
B07	Maroczy Defense, Pirc	1.e4 d6 2.d4 e5
C40	Maroczy Gambit	1.e4 e5 2.Nf3 d5 3.exd5 Bd6
B12	Maroczy Gambit, Caro-Kann	1.e4 c6 2.d4 d5 3.f3 dxe4 4.fxe4 e5 5.Nf3 exd4 6.Bc4
B74	Maroczy Line, Sicilian Dragon	1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6 6.Be3 Bg7 7.Be2 Nc6 8.O-O O-O 9.Nb3 Be6 10.f4 Na5
C49	Maroczy Variation, 4 Knights	1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 4.Bb5 Bb4 5.O-O O-O 6.d3 d6 7.Ne2
B02	Maroczy Variation, Alekhine	1.e4 Nf6 2.d3
B12	Maroczy Variation, Caro	1.e4 c6 2.d4 d5 3.f3
C14	Maroczy Variation, French	1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bg5 Be7 5.e5 Nfd7 6.h4 a6
C40	Maroczy; Elephant Gambit	1.e4 e5 2.Nf3 d5 3.exd5 Bd6
C18	Maroczy-Willis Variation, French	1.e4 e6 2.d4 d5 3.Nc3 Bb4 4.e5 c5 5.a3 cxd4 6.axb4 dxc3
C30	Marshall (Euwe) Attack, KGD	1.e4 e5 2.f4 Bc5 3.Nf3 d6 4.c3 Bg4 5.fxe5 dxe5 6.Qa4+
C89	Marshall Attack, Ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 O-O 8.c3 d5
C31	Marshall C-G, KGD	1.e4 e5 2.f4 d5 3.exd5 c6
C89	Marshall Counter-Attack, Ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 O-O 8.c3 d5 9.d4
D06	Marshall Defense; Knight Defense, QGD	1.d4 d5 2.c4 Nf6
C48	Marshall Gambit, Four Knights	1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 4.Bb5 Bc5 5.Nxe5 Nd4 6.Ba4 O-O
B00	Marshall Gambit, Nimzovich	1.e4 Nc6 2.d4 d5 3.exd5 Qxd5 4.Nc3
B01	Marshall Gambit, Scandanavian G; Modern Variation, CC	1.e4 d5 2.exd5 Nf6
D31	Marshall Gambit, Semi-Slav	1.d4 d5 2.c4 e6 3.Nc3 c6 4.e4
B23	Marshall Gambit, Sicilian	1.e4 c5 2.Nc3 e6 3.d4 d5
D32	Marshall Gambit, Tarrasch	1.d4 d5 2.c4 e6 3.Nc3 c5 4.cxd5 exd5 5.e4
C56	Marshall Variation, 2 Knights	1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.d4 exd4 5.O-O Bc5 6.e5 d5 7.exf6 dxc4 8.Re1+ Be7 9.Ng5 Qd5 10.Nc3 Qf5
B01	Marshall Variation, Center Counter	1.e4 d5 2.exd5 Nf6 3.d4 Nxd5
C10	Marshall Variation, French	1.e4 e6 2.d4 d5 3.Nc3 c5
C42	Marshall Variation, Petroff	1.e4 e5 2.Nf3 Nf6 3.Nxe5 d6 4.Nf3 Nxe4 5.d4 d5 6.Bd3 Bd6
B20	Marshall Variation, Sicilian	1.e4 c5 2.b4 cxb4 3.a3
B41	Marshall Variation, Sicilian	1.e4 c5 2.Nf3 e6 3.d4 d5
B10	Masi Variation, Caro-Kann	1.e4 c6 2.d4 Nf6
D00	Mason Attack, Queen Pawn Game	1.d4 d5 2.f4
C40	Mason Countergambit, Latvian	1.e4 e5 2.Nf3 f5 3.d4
C54	Mason Gambit, Italian	1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.c3 Nf6 5.d4 exd4 6.O-O
C42	Mason Variation, Petroff	1.e4 e5 2.Nf3 Nf6 3.Nxe5 d6 4.Nf3 Nxe4 5.d4 d5 6.Bd3 Be7 7.O-O O-O
C42	Mason-Showalter Variation, Petroff	1.e4 e5 2.Nf3 Nf6 3.Nxe5 d6 4.Nf3 Nxe4 5.d4 d5 6.Bd3 Nc6
B10	Massachussets Defense, Caro-Kann	1.e4 c6 2.d4 f5
B06	Masur Gambit	1.e4 g6 2.d4 Nh6 3.Nc3 f5 4.Bxh6 Bxh6 5.exf5 O-O
B82	Matanovic Attack, Sicilian; B82	1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e6 6.f4
B00	Matovinsky Gambit	1.e4 b6 2.d4 Bb7 3.Bd3 f5
B00	Matovinsky Gambit	1.e4 b6 2.d4 Bb7 3.Bd3 f5 4.exf5 Bxg2 5.Qh5+ g6
B02	Matsukevich Gambit, Alekhine	1.e4 Nf6 2.e5 Nd5 3.c4 Nb6 4.c5 Nd5 5.Nc3 Nxc3 6.dxc3 d6 7.Bg5
A89	Matulovic Variation, Dutch; A89	1.d4 f5 2.c4 Nf6 3.g3 g6 4.Bg2 Bg7 5.Nf3 O-O 6.O-O d6 7.Nc3 Nc6
C33	Maurian Defense, KGA	1.e4 e5 2.f4 exf4 3.Bc4 Nc6
C56	Max Lange Attack	1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.d4 exd4 5.O-O Bc5 6.e5
C40	Mayet Attack, Latvian	1.e4 e5 2.Nf3 f5 3.Bc4
C38	Mayet Gambit, KGA	1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Bc4 Bg7 5.d4 d6 6.c3
A22	Mazedonisch Variation, English	1.c4 e5 2.Nc3 Nf6 3.f4
C40	McConnell Defense	1.e4 e5 2.Nf3 Qf6
C12	McCutcheon Variation, French	1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bg5 Bb4
C33	McDonnell Attack, KGA	1.e4 e5 2.f4 exf4 3.Bc4 Qh4+ 4.Kf1 g5 5.Nc3 Bg7 6.g3
D20	McDonnell Defense, QGA	1.d4 d5 2.c4 dxc4 3.e4 e5
C23	McDonnell Double Gambit, Bishop	1.e4 e5 2.Bc4 Bc5 3.b4 Bxb4 4.f4
A39	Mecking Variation, Symmetrical English; A39	1.c4 c5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.Nf3 Nf6 6.O-O O-O 7.d4
C01	Mediterranean Defense, French	1.e4 e6 2.d4 Nf6
A50	Medusa Gambit	1.d4 Nf6 2.c4 g5
C23	Meitner-Mieses Gambit, Vienna	1.e4 e5 2.Nc3 Nc6 3.Bc4 Bc5 4.Qg4 Qf6 5.Nd5
A00	Melleby Gambit, Dunst	1.Nc3 d5 2.f4 d4 3.Ne4 c5
C20	Mellon Gambit	1.e4 e5 2.Qh5 Nc6 3.Bc4 Nh6 4.d3 g6 5.Qf3 f6 6.Ne2 d5
B20	Mengarini Gambit, Sicilian	1.e4 c5 2.a3
B20	Mengarini Gambit, Sicilian	1.e4 c5 2.a3 Nc6 3.b4
C20	Mengarini Opening	1.e4 e5 2.a3
C26	Mengarini Variation, Vienna	1.e4 e5 2.Nc3 Nf6 3.a3
D47	Meran Variation, QGD; D47	1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.e3 Nbd7 6.Bd3 dxc4 7.Bxc4
C53	Mestel Variation, Italian	1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.c3 Qe7 5.d4 Bb6 6.Bg5
C49	Metger Unpin Variation, 4 Knights	1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 4.Bb5 Bb4 5.O-O O-O 6.d3 d6 7.Bg5 Bxc3 8.bxc3 Qe7 9.Re1 Nd8
A09	Michel Gambit, Reti	1.Nf3 d5 2.c4 d4 3.b4 c5
C37	Middleton Counter-Gambit, KGA	1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Bc4 d6 5.O-O Bg4 6.h3 h5 7.hxg4
C52	Mieses Defense, Evans	1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.b4 Bxb4 5.c3 Ba5 6.d4 exd4 7.O-O Nge7
B12	Mieses Gambit, Caro	1.e4 c6 2.d4 d5 3.Be3
B01	Mieses Variation, Center Counter	1.e4 d5 2.exd5 Qxd5 3.Nc3 Qa5 4.d4 Nf6
C45	Mieses Variation, Scotch	1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Nxd4 Nf6 5.Nxc6
C26	Mieses Variation, Vienna	1.e4 e5 2.Nc3 Nf6 3.g3
D00	Mieses; Nimzovich Var, BDG	1.d4 d5 2.e4 dxe4 3.f3 Nc6
D00	Mieses; Nimzovich Var, BDG	1.d4 d5 2.e4 dxe4 3.Nc3 Nc6
A00	Mieses; Valencia; Venezuelan Opening	1.d3
B01	Mieses-Kotroc Variation, Center Counter	1.e4 d5 2.exd5 Qxd5
C20	Miguel Gambit	1.e4 e5 2.Bb5 Bc5 3.b4
B02	Mikenas Gambit, Alekhine	1.e4 Nf6 2.e5 Nd5 3.c4 Nb6 4.c5 Nd5 5.Bc4 e6 6.Nc3 d6 7.Nxd5 exd5 8.Bxd5
A66	Mikenas V, Benoni	1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.e4 g6 7.f4 Bg7 8.e5
B00	Mikenas Variation, Nimzovich Defense	1.e4 Nc6 2.d4 d6
A15	Mikenas-Carls Variation, English	1.c4 Nf6
D45	Mikhalchishin Line, Semi-Slav	1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.e3 Nbd7 6.Qc2 Bd6 7.e4 dxe4 8.Nxe4 Nxe4 9.Qxe4 e5 10.dxe5
D31	Miladinovic Gambit, QGD	1.d4 d5 2.c4 e6 3.Nc3 Be7 4.e4 dxe4 5.f3
C30	Miles Defense, KGD	1.e4 e5 2.f4 Nc6 3.Nf3 f5
C31	Miles Gambit, KGD	1.e4 e5 2.f4 d5 3.exd5 Bc5
E12	Miles Variation, QID	1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.Bf4
C42	Millenium Attack, Petroff	1.e4 e5 2.Nf3 Nf6 3.Nxe5 d6 4.Nf3 Nxe4 5.Bd3
C45	Millennium Variation, Scotch	1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Nxd4 Bc5 5.Be3 Qf6 6.c3 Qg6
B15	Milner-Barry Gambit, Caro; Rasa-Studier Gambit	1.e4 c6 2.d4 d5 3.Nc3 dxe4 4.f3
C02	Milner-Barry Gambit, French	1.e4 e6 2.d4 d5 3.e5 c5 4.c3 Nc6 5.Nf3 Qb6 6.Bd3
C02	Milner-Barry Gambit, French	1.e4 e6 2.d4 d5 3.e5 c5 4.c3 Nc6 5.Nf3 Qb6 6.Bd3 cxd3 7.cxd3 Bd7 8.O-O Nxd4 9.Nxd4
E33	Milner-Barry Variation, Nimzo-Indian	1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Qc2 Nc6 5.Nf3 d6
E33	Milner-Barry, Zurich Variation, Nimzo-Indian; E33	1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Qc2 Nc6
C67	Minckwitz Variation, Ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 Nf6 4.O-O Nxe4 5.d4 Be7 6.dxe5
B11	Mindeno Variation, Caro-Kann	1.e4 c6 2.Nc3 d5 3.Nf3 Bg4
B06	Mittenberger Gambit, Modern Defense	1.e4 g6 2.d4 Bg7 3.Nc3 d5
C40	Mlotkowski Variation, Latvian	1.e4 e5 2.Nf3 f5 3.Nc3
C43	Modern Attack, Petroff	1.e4 e5 2.Nf3 Nf6 3.d4
A60	Modern Benoni	1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6
C55	Modern Bishop's Opening	1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.d3
A40	Modern Defense	1.d4 g6 2.c4 Bg7 3.Nc3 d6
E76	Modern Defense, KID	1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f4 Na6
D78	Modern Defense, Neo-Grunfeld	1.d4 Nf6 2.c4 g6 3.g3 d5 4.Bg2 Bg7 5.Nf3 O-O 6.O-O dxc4
D20	Modern Defense, QGA	1.d4 d5 2.c4 dxc4 3.e4 Nc6
C45	Modern Defesne, Scotch	1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Nxd4 Qh4 5.Nc3 Bb4
D06	Modern Gambit, Chigorin Defense	1.d4 d5 2.c4 Nc6 3.Nc3 Nf6 4.Nf3 dxc4
D11	Modern Line, Slav; D11	1.d4 d5 2.c4 c6 3.Nf3
D85	Modern Main Line, Grunfeld	1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.cxd5 Nxd5 5.e4 Nxc3 6.bxc3 Bg7 7.Nf3
B84	Modern Paulsen, Sicilian; B84	1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e6 6.Be2 a6
E05	Modern Sharp Variation, Catalan	1.d4 Nf6 2.c4 e6 3.g3 d5 4.Bg2 dxc4 5.Nf3 Nc6 6.Qa4 Bb4+
C71	Modern Steinitz Defense, Ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 d6
C32	Modern Transfer, Falkbeer Countergambit, KGD	1.e4 e5 2.f4 d5 3.exd5 exf4
A57	Modern Variation, Benko Gambit	1.d4 Nf6 2.c4 c5 3.d5 b5 4.cxb5 a6 5.e3
B12	Modern Variation, Caro-Kann	1.e4 c6 2.d4 d5 3.Nd2
A01	Modern Variation, Larsen	1.b3 e5
D50	Modern Variation, QGD; D50	1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5
B50	Modern Variation, Sicilian; B50	1.e4 c5 2.Nf3 d6
C27	Modern Variation, Vienna	1.e4 e5 2.Nc3 Nf6 3.Bc4 Nxe4
B10	Modern; English Variation, Accelerated Panov; Caro-Kann	1.e4 c6 2.c4
C63	Moehring Variation, Ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 f5 4.Nc3 fxe4 5.Nxe4 d5 6.Nxe5 dxe4 7.Nxc6 Qd5
C54	Moeller (Therkatz) Attack, Italian	1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.c3 Nf6 5.d4 exd4 6.cxd4 Bb4+ 7.Nc3 Nxe4 8.O-O Bxc3 9.d5
C78	Moeller Variation, Ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Bc5
B02	Mokele Mbembe; Knight's Tour	1.e4 Nf6 2.e5 Ne4
B27	Mongoose Variation, Sicilian	1.e4 c5 2.Nf3 Qa5
B06	Mongredien Defense, Pirc	1.e4 g6 2.d4 Bg7 3.Nf3 b6
B06	Monkey's Bum, Pirc	1.e4 g6 2.Bc4 Bg7 3.Qf3 e6 4.d4
C27	Monster Variation, Vienna	1.e4 e5 2.Nc3 Nf6 3.Bc4 Nxe4 4.Qh5 Nd6 5.Bb3 Be7
C01	Monte Carlo Variation, French	1.e4 e6 2.d4 d5 3.exd5 exd5 4.c4
A40	Montevideo Defense	1.d4 Nc6 2.d5 Nb8
E11	Monticelli Trap	1.d4 Nf6 2.c4 e6 3.Nf3 Bb4+ 4.Bd2 Bxd2+ 5.Qxd2 b6 6.g3 Bb7 7.Bg2 O-O 8.Nc3 Ne4 9.Qc2 Nxc3 10.Bg5
C42	Moody Gambit, Petroff	1.e4 e5 2.Nf3 Nf6 3.Qe2 Nc6 4.d4
C40	Morgado Defense, Latvian	1.e4 e5 2.Nf3 f5 3.Bc4 Nf6
C03	Morozevich Variation, French	1.e4 e6 2.d4 d5 3.Nd2 Be7
C51	Morphy Attack, Evans	1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.b4 Bxb4 5.c3 Bc5 6.d4 exd4 7.O-O d6 8.cxd4 Bb6 9.Nc3
B20	Morphy Defense Deferred, Smith-Morra Accepted	1.e4 c5 2.d4 cxd4 3.c3 dxc3 4.Nxc3 Nc6 5.Nf3 e6 6.Bc4 a6 7.O-O b5 8.Bb3 Bc5
C32	Morphy Defense, KGD	1.e4 e5 2.f4 d5 3.exd5 e4 4.d3 Nf6 5.Nc3 Bb4 6.Bd2 e3
C68	Morphy Defense, Ruy Lopez; C68	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6
C70	Morphy Defense, Ruy Lopez; C70	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4
B20	Morphy Defense, Smith-Morra Accepted, Sicilian	1.e4 c5 2.d4 cxd4 3.c3 dxc3 4.Nxc3 Nc6 5.Nf3 e6 6.Bc4 Bc5
C01	Morphy Gambit, French	1.e4 e6 2.d4 d5 3.Nh3
C41	Morphy Gambit, Philidor	1.e4 e5 2.Nf3 d6 3.d4 exd4 4.Bc4
B20	Morphy Gambit, Sicilian	1.e4 c5 2.d4 cxd4 3.Nf3
D00	Morris Counter-Gambit	1.d4 d5 2.Bf4 c5 3.e4 dxe4
D00	Morris Gambit	1.d4 d5 2.Bf4 c5 3.e4
C65	Mortimer Trap, Ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 Nf6 4.d3 Ne7 5.Nxe5 c6
C65	Mortimer Variation, Ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 Nf6 4.d3 Ne7
B55	Moscow (Prins) Variation, Sicilian	1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.f3
B51	Moscow Gambit, Sicilian	1.e4 c5 2.Nf3 d6 3.Bb5+ Nc6 4.O-O Bd7 5.c3 a6 6.Bxc6 Bxc6 7.Re1 Nf6 8.d4 Bxe4 9.Bg5
C17	Moscow Variation, French	1.e4 e6 2.d4 d5 3.Nc3 Bb4 4.e5 c5 5.Qg4
B51	Moscow Variation, Sicilian; Canal Attack; B51	1.e4 c5 2.Nf3 d6 3.Bb5+
A40	Mosquito Gambit, Englund	1.d4 e5 2.dxe5 Qh4
C82	Motzko Variation, Ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Nxe4 6.d4 b5 7.Bb3 d5 8.dxe5 Be6 9.c3 Bc5 10.Qd3
A02	Mujannah Opening	1.f4 Nf6 2.c4
D70	Murey Attack, Grunfeld	1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.f3 c5 5.cxd5 Nxd5 6.Na4
E12	Murey Variation, QID	1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.a3 Bb7 5.Nc3 d5 6.cxd5 Nxd5 7.Qc2 c5 8.e4 Nxc3 9.bxc3 Nc6 10.Bb2 cxd4 11.cxd4 Rc8 12.Rd1 Bd6
C43	Murret Variation, Petroff	1.e4 e5 2.Nf3 Nf6 3.d4 Nxe4 4.Bd3 Nc6
A57	Mutkin Countergambit, Benko Gambit	1.d4 Nf6 2.c4 c5 3.d5 b5 4.g4
C37	Muzio-Polerio Gambit, KGA; Wild Muzio	1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Bc4 g4 5.O-O
B20	Myers Attack, Sicilian	1.e4 c5 2.h4
A02	Myers Defense, Bird	1.f4 b5
A10	Myers Defense, English	1.c4 g5 2.d4 Bg7
A00	Myers Defense, Hungarian	1.g3 g5
B02	Myers Gambit, Alekhine	1.e4 Nf6 2.Nc3 d5 3.d3 dxe4 4.Bg5
A00	Myers Gambit, Dunst	1.Nc3 d5 2.e4 dxe4 3.Nxe4 e5 4.Bg5
A00	Myers Gambit, Kadas	1.h4 d5 2.d4 c5 3.e4
A05	Myers Polish Attack	1.Nf3 Nf6 2.a4 g6 3.b4
A00	Myers Variation, Polish	1.b4 d5 2.Bb2 c6 3.a4
C56	Nachmanson Gambit, 2 Knights	1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.d4 exd4 5.O-O Nxe4 6.Nc3
D85	Nadanian Attack	1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.cxd5 Nxd5 5.Na4
B90	Najdorf Variation, Sicilian; B90	1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6
C20	Napoleon Attack	1.e4 e5 2.Qf3
A00	Napoleon Attack, Dunst	1.Nc3 e5 2.Nf3
A00	Napoleon Attack, Dunst	1.Nc3 e5 2.Nf3 Nc6 3.d4
C44	Napoleon Gambit, Scotch	1.e4 e5 2.Nf3 Nc6 3.d4 Nxd4 4.Nxd4 exd4 5.Bc4
A30	Napolitano Gambit, Symmetrical English	1.c4 c5 2.Nf3 Nf6 3.b4
B00	Naselwaus Variation, Owen's Defense	1.e4 b6 2.d4 Bb7 3.Bg5
A19	Nei Gambit, English	1.c4 Nf6 2.Nc3 e6 3.e4 c5 4.e5 Ng8
C82	Nenarokov Variation, Ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Nxe4 6.d4 b5 7.Bb3 d5 8.dxe5 Be6 9.c3 Bc5 10.Qd3 Ne7
A13	Neo Catalan Accepted, English	1.c4 e6 2.Nf3 d5 3.g3 Nf6 4.Bg2 dxc4
A14	Neo Catalan Declined, English	1.c4 e6 2.Nf3 d5 3.g3 Nf6 4.Bg2 Be7 5.O-O
A13	Neo Catalan, English	1.c4 e6 2.Nf3 d5 3.g3 Nf6
D55	Neo Orthodox Variation, QGD	1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 O-O 6.Nf3 h6
A09	Neo-Catalan, Reti	1.Nf3 d5 2.c4 e6 3.g3
C35	Neo-Cunningham Gambit, KGA; McCormick Defense	1.e4 e5 2.f4 exf4 3.Nf3 Be7 4.Bc4 Nf6
D70	Neo-Grunfeld Defense	1.d4 Nf6 2.c4 g6 3.Nf3 d5
A40	Neo-Modern Defense	1.d4 g6 2.c4 Bg7 3.e4 e5
B00	Neo-Mongoloid Defense, Nimzovich	1.e4 Nc6 2.d4 f6
D54	Neo-Orthodox Variation, QGD; D54	1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 O-O 6.Rc1
C78	Neo-Steinitz Defense, Ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O b5 6.Bb3 d6
A57	Nescafe Frappe Attack, Benko Gambit	1.d4 Nf6 2.c4 c5 3.d5 b5 4.cxb5 a6 5.Nc3 axb5 6.e4 b4 7.Nb5
D00	Netherlands Variation, BDG	1.d4 d5 2.e4 dxe4 3.Nc3 f5
C39	Neumann Defense, KGA	1.e4 e5 2.f4 exf4 3.Nf3 g5 4.h4 g4 5.Ne5 Nc6
C44	Neumann Gambit, Ponziani	1.e4 e5 2.Nf3 Nc6 3.c3 Nf6 4.Bc4
B12	New Caro-Kann	1.e4 c6 2.d4 d5 3.Nd2 g6
C70	Nightingale Gambit, Ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 b5 5.Bb3 Na5 6.Bxf7+
C44	Nikitin Gambit, Ponziani	1.e4 e5 2.Nf3 Nc6 3.c3 d5 4.Bb5 dxe4 5.Nxe5 Qd5 6.Qa4
A90	Nimzo-Dutch Variation	1.d4 f5 2.c4 Nf6 3.g3 e6 4.Bg2 Bb4+
A17	Nimzo-English Opening	1.c4 Nf6 2.Nc3 e6 3.Nf3 Bb4
E20	Nimzo-Indian Defense	1.d4 Nf6 2.c4 e6 3.Nc3 Bb4
D00	Nimzovich Attack, BDG	1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 exf3 5.Nxf3 g6 6.Bc4 Bg7 7.Ne5
C02	Nimzovich Attack, French	1.e4 e6 2.d4 d5 3.e5 c5 4.Qg4
C40	Nimzovich Attack, Latvian	1.e4 e5 2.Nf3 f5 3.Nxe5 Qf6 4.d4 d6 5.Nc4 fxe4 6.Ne3
C42	Nimzovich Attack, Petroff	1.e4 e5 2.Nf3 Nf6 3.Nxe5 d6 4.Nf3 Nxe4 5.Nc3
E15	Nimzovich Attack, QID	1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3 Ba6 5.Qa4+
C62	Nimzovich Attack, Ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 d6 4.d4 Bd7 4.Nc3 Nf6 5.Bxc6
D70	Nimzovich Attack; Anti-Grunfeld; Alekhine Variation	1.d4 Nf6 2.c4 g6 3.f3
B00	Nimzovich Defense	1.e4 Nc6
B00	Nimzovich Gambit, Nimzovich Defense	1.e4 Nc6 2.d4 d5 3.Nc3 dxe4 4.d5 Ne5
A06	Nimzovich Opening, Reti; Nimzovich-Larsen Attack	1.Nf3 d5 2.b3
E11	Nimzovich Variation, Bogo-Indian	1.d4 Nf6 2.c4 e6 3.Nf3 Bb4+ 4.Bd2 Qe7
A83	Nimzovich Variation, Dutch	1.d4 f5 2.e4 fxe4 3.Nc3 Nf6 4.Bg5 b6
A20	Nimzovich Variation, English	1.c4 e5 2.Nf3
C02	Nimzovich Variation, French	1.e4 e6 2.d4 d5 3.e5 c5 4.Nf3
C31	Nimzovich Variation, KGD; Anderssen Attack	1.e4 e5 2.f4 d5 3.exd5 e4 4.Bb5+
A61	Nimzovich Variation, Knight's Tour Variation, Benoni	1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.Nf3 g6 7.Nd2
E15	Nimzovich Variation, QID	1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3 Ba6
B32	Nimzovich Variation, Sicilian; Nimzo-American Variation	1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 d5
A46	Nimzovich Variation, Torre Attack	1.d4 Nf6 2.Nf3 e6 3.Bg5 h6
B16	Nimzovich; Bronstein-Larsen, Caro; B16	1.e4 c6 2.d4 d5 3.Nc3 dxe4 4.Nxe4 Nf6 5.Nxf6+ gxf6
B29	Nimzovich; Rubinstein Var, Sicilian; B29	1.e4 c5 2.Nf3 Nf6
C77	Nimzovich; Tarrasch Var, Ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.Nc3
A20	Nimzovich-Flohr Variation, English	1.c4 e5 2.Nf3 e4
C31	Nimzovich-Marshall Variation, KGD	1.e4 e5 2.f4 d5 3.exd5 c6
C47	Noa Gambit, Four Knights	1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 4.Bc4 Nxe4 5.Bxf7+
E34	Noa Variation, Nimzo-Indian; E34	1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Qc2 d5
C71	Noah's Ark Trap, Ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 d6 5.d4 b5 6.Bb3 exd4 7.Nxd4 Nxd4 8.Qxd4 c5 9.Qd5 Be6 10.Qc6+ Bd7
B02	Noch Gambit, Alekhine	1.e4 Nf6 2.Nc3 d5 3.exd5
E81	Normal Defesne, Sameisch Variation, KID; E81	1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f3 O-O
D08	Normal Line, Albin Countergambit, QGD	1.d4 d5 2.c4 e5 3.dxe5 d4 4.Nf3
C51	Normal Position, Evans Gambit	1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.b4 Bxb4 5.c3 Bc5 6.d4 exd4 7.O-O d6 8.cxd4 Bb6
B28	Normal System, O'Kelly Sicilian	1.e4 c5 2.Nf3 a6 3.d4
A52	Normal Variation, Budapest; A52	1.d4 Nf6 2.c4 e5 3.dxe5 Ng4
A85	Normal Variation, Dutch	1.d4 f5 2.c4 Nf6
C10	Normal Variation, French; C10	1.e4 e6 2.d4 d5 3.Nc3
A50	Normal Variation, Indian Game; A50	1.d4 Nf6 2.c4
E97	Normal Variation, KID	1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 O-O 6.Be2 e5 7.O-O Nc6 8.d5 Ne7
E70	Normal Variation, KID; E70	1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4
E46	Normal Variation, Nimzo-Indian; E46	1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O
A55	Normal Variation, Old Indian; A55	1.d4 Nf6 2.c4 d6 3.Nc3 e5 4.Nf3 Nbd7 5.e4
C78	Normal Variation, Ruy Lopez; C78	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O
D45	Normal Variation, Semi-Slav	1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.e3 Nbd7
A34	Normal Variation, Symmetrical English; A34	1.c4 c5 2.Nc3
C30	Norwalde (Norwalder) Variation, KGD	1.e4 e5 2.f4 Qf6
C20	Norwalder Gambit	1.e4 e5 2.c3 d5 3.Qh5 Bd6
B06	Norwegian Defense	1.e4 g6 2.d4 Nf6
D31	Noteboom Variation, Semi-Slav	1.d4 d5 2.c4 e6 3.Nc3 c6 4.Nf3 dxc4
B72	Nottingham Variation, Sicilian	1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6 6.Be3 Bg7 7.Be2 Nc6 8.Nb3
D20	Novikov Gambit, QGA	1.d4 d5 2.c4 dxc4 3.e3 e5 4.Bc4 exd4 5.Qb3 Qe7 6.Nd2
A00	Novosibirsk Variation, Dunst	1.Nc3 c5 2.d4 cxd4 3.Qxd4 Nc6 4.Qh4
A00	Nowokunski Gambit, Dunst	1.Nc3 e5 2.f4 exf4 3.e4
C60	Nuremberg Defense, Ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 f6
C65	Nyholm Attack, Ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 Nf6 4.d4 exd4 5.O-O
A04	Oberndorfer Gambit; Reti	1.Nf3 g5
D00	O'Kelly Variation, BDG	1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 c6
E26	O'Kelly Variation, Nimzo-Indian	1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.a3 Bxc3+ 5.bxc3 c5 6.e3 b6
B28	O'Kelly Variation, Sicilian; B28	1.e4 c5 2.Nf3 a6
E48	Olafsson Variation, Nimzo-Indian	1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Bd3 d5 6.Nf3 c5 7.O-O dxc4 8.Bxc4 b6 9.Qe2 Bb7 10.Rd1 Qc8
A43	Old Benoni	1.d4 c5 2.d5 d6
A06	Old Indian Attack	1.Nf3 d5 2.d3
A53	Old Indian Defense; Chigorin Indian Defense; A53	1.d4 Nf6 2.c4 d6
C32	Old Line, Falkbeer Countergambit, KGD	1.e4 e5 2.f4 d5 3.exd5 e4 4.d3 Nf6 5.Qe2
D48	Old Meran Variation, QGD	1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.e3 Nbd7 6.Bd3 dxc4 7.Bxc4 b5 8.Bd3 a6 9.O-O
B30	Old Sicilian	1.e4 c5 2.Nf3 Nc6
D20	Old Variation, QGA	1.d4 d5 2.c4 dxc4 3.e3
D48	Old Variation, Semi-Slav	1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.e3 Nbd7 6.Bd3 dxc4 7.Bxc4 b5 8.Bd3 a6 9.e4 c5 10.e5
E33	Old Zurich Variation, Nimzo-Indian	1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Qc2 Nc6 5.Nf3 d6 6.a3
C12	Olland (Dutch) Variation, French	1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bg5 Bb4 5.e5 h6 6.Bc1
C25	Omaha Gambit, Vienna	1.e4 e5 2.Nc3 d6 3.f4
A45	Omega Gambit	1.d4 Nf6 2.e4
A08	Omega-Delta Gambit, KIA	1.Nf3 d5 2.g3 e5
E04	Open Defense, Catalan; E04	1.d4 Nf6 2.c4 e6 3.g3 d5 4.Bg2 dxc4 5.Nf3
C07	Open System Tarrasch French; C07	1.e4 e6 2.d4 d5 3.Nd2 c5
C56	Open Variation, Two Knights Defense; C56	1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.d4
D80	Opocensky Variation, Grunfeld	1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.e3 Bg7 5.Nf3 O-O 6.Bd2
D94	Opocensky Variation, Grunfeld	1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.e3 O-O 6.Bd2
E17	Opocensky Variation, QID	1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3 Bb7 5.Bg2 Be7 6.Nc3 Ne4 7.Bd2
B92	Opocensky Variation, Sicilian	1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Be2 e5
B92	Opocensky Variation, Sicilian; B92	1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Be2
D78	Original Defesne, Neo-Grunfeld; D78	1.d4 Nf6 2.c4 g6 3.g3 d5 4.Bg2 Bg7 5.Nf3 O-O 6.O-O c6
C33	Orsini Gambit, KGA	1.e4 e5 2.f4 exf4 3.b3
E85	Orthodox Variation, KID; E85	1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f3 O-O 6.Be3 e5
E91	Orthodox Variation, KID; E91	1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 O-O 6.Be2
D60	Orthodox Variation, QGD; D60	1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 O-O 6.Nf3 Nbd7
C00	Orthoschapp Variation, French	1.e4 e6 2.c4 d5 3.cxd5 exd5 4.Qb3
A45	Oshima Defense	1.d4 Nf6 2.g4 e5
A00	Outflank Variation, Polish	1.b4 c6
B00	Owen's Defense; Greek Defense	1.e4 b6
C47	Oxford Gambit, Four Kngihts	1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 4.d4 Bb4 5.d5 Nd4
C26	Oxford Variation, Vienna	1.e4 e5 2.Nc3 Nf6 3.f4 d5 4.fxe5 Nxe4 5.d3
A85	Ozol Variation, Dutch	1.d4 f5 2.c4 Nf6 3.Nc3 g6 4.Nf3 Bg7 5.Bg5
D80	Pachman Variation, Grunfeld	1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.e3 Bg7 5.Nf3 O-O 6.Qb3 dxc4 7.Bxc4 Nbd7 8.Ng5
A45	Paleface Attack	1.d4 Nf6 2.f3
E83	Panno Formation, KID	1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f3 O-O 6.Be3 Nc6 7.Nge2 a6
E60	Panno System	1.d4 Nf6 2.c4 g6 3.g3 Bg7 4.Bg2 d6 5.Nf3 O-O 6.O-O Nc6 7.d5 Na5
E60	Panno Variation	1.d4 Nf6 2.c4 g6 3.g3 Bg7 4.Bg2 d6 5.Nf3 O-O 6.Nc3 Nc6 7.O-O a6 8.h3 Rb8
E63	Panno Variation, KID; E63	1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.Nf3 d6 5.g3 O-O 6.Bg2 Nc6 7.O-O a6
E41	Panov Attack, Nimzo-Indian	1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 c5 5.Nf3 cxd4 6.exd4 d5
B01	Panov Transfer, Center Counter	1.e4 d5 2.exd5 Nf6 3.c4 c6
B04	Panov Variation, Alekhine	1.e4 Nf6 2.e5 Nd5 3.d4 d6 4.Nf3 Bg4 5.h3
B76	Panov Variation, Sicilian Dragon	1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6 6.Be3 Bg7 7.f3 O-O 8.Qd2 Nc6 9.g4
B07	Panov; Opatijav; Byrne Variation, Pirc	1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.Bg5
B13	Panov-Botvinnik; Gunderam Attack	1.e4 c6 2.d4 d5 3.exd5 cxd5 4.c4
C30	Panteldakis Countergambit, KGD	1.e4 e5 2.f4 f5
C00	Papa-Ticulat Gambit, French	1.e4 e6 2.b3 d5 3.Bb2
A00	Paris Gambit	1.Nh3 d5 2.g3 e5 3.f4
C33	Paris Gambit, KGA	1.e4 e5 2.f4 exf4 3.Ne2
D80	Paris Variation, Grunfeld	1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.e3 Bg7 5.Nf3 O-O 6.Bd3
B08	Parma Defense, Pirc	1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.Nf3 Bg7 5.Be2 O-O 6.O-O Bg4
C44	Paschman Wing Gambit	1.e4 e5 2.Nf3 Nc6 3.b4
C23	Paschmann Gambit, Bishop	1.e4 e5 2.Bc4 Nf6 3.Ne2 Nxe4 4.Nec3
A01	Paschmann Gambit, Larsen	1.b3 e5 2.Bb2 Nc6 3.f4
C22	Paulsen Attack Variation, Center	1.e4 e5 2.d4 exd4 3.Qxd4 Nc6 4.Qe3
C02	Paulsen Attack, French	1.e4 e6 2.d4 d5 3.e5 c5 4.c3 Nc6 5.Nf3
B00	Paulsen Attack, Nimzovich Defense	1.e4 Nc6 2.d4 e5 3.dxe5 Nxe5 4.Nf3
C42	Paulsen Attack, Petroff	1.e4 e5 2.Nf3 Nf6 3.Nxe5 d6 4.Nc4
C41	Paulsen Attack, Philidor	1.e4 e5 2.Nf3 d6 3.d4 exd4 4.Nxd4 d5 5.exd5
C45`	Paulsen Attack, Scotch	1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Nxd4 Bc5 5.Be3 Qf6 6.c3 Nge7 7.Bb5
C29	Paulsen Attack, Vienna	1.e4 e5 2.Nc3 Nf6 3.f4 d5 4.fxe5 Nxe4 5.Qf3
C40	Paulsen Counter-Gambit	1.e4 e5 2.Nf3 d5 3.exd5 e4
C39	Paulsen Defense Deferred, KGA	1.e4 e5 2.f4 exf4 3.Nf3 g5 4.h4 g4 5.Ne5 Nf6 6.Bc4 d5 7.exd5 Bg7
C37	Paulsen Defense, KGA	1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Bc4 g4 5.O-O gxf3 6.Qxf3 Qf6 7.e5 Qxe5 8.d3 Bh6 9.Nc3 Ne7 10.Bd2
C39	Paulsen Defense, KGA	1.e4 e5 2.f4 exf4 3.Nf3 g5 4.h4 g4 5.Ne5 Bg7
C25	Paulsen Defense, Vienna	1.e4 e5 2.Nc3 Nc6 3.f4 exf4 4.d4 Qh4+ 5.Ke2 d6
B20	Paulsen Formation, Smith-Morra Accepted, Sicilian	1.e4 c5 2.d4 cxd4 3.c3 dxc3 4.Nxc3 Nc6 5.Nf3 e6 6.Bc4 a6
B28	Paulsen Line, Sicilian	1.e4 c5 2.Nf3 a6 3.c4 e6
C49	Paulsen Variation, 4 Knights	1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 4.Bb5 Bb4 5.O-O O-O 6.Bxc6
C60	Paulsen Variation, Cozio Defense, Ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 Nge7 4.Nc3 g6
C51	Paulsen Variation, Evans	1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.b4 Bxb4 5.c3 Bc5 6.d4 exd4 7.O-O d6 8.cxd4 Bb6 9.d5 Na5 10.Bb2 Ne7
C61	Paulsen Variation, Ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 Nd4 4.Nxd4 exd4 5.O-O Ne7
C45	Paulsen Variation, Scotch	1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Nxd4 Qh4 5.Nf5
B85	Paulsen Variation, Sicilian	1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e6 6.Be2 a6 7.O-O Qc7 8.f4 Nc6
B45	Paulsen Variation, Sicilian	1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nc6 5.Nc3 Nf6 6.Ndb5 Bb4
C25	Paulsen Variation, Vienna	1.e4 e5 2.Nc3 Nc6 3.g3
C44	Paulsen; Anderssen C-A, Scotch	1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Bc4 Bc5 5.O-O d6 6.c3 Bg4
B41	Paulsen; Kan Variation, Sicilian	1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 a6
A45	Pawn Push Variation	1.d4 Nf6 2.d5
A57	Pawn Return Variation, Benko Gambit	1.d4 Nf6 2.c4 c5 3.d5 b5 4.cxb5 a6 5.b6
A66	Pawn Storm Variation, Benoni; A66	1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.e4 g6 7.f4
A02	Pawn Thrust Attack, Bird	1.f4 f5 2.d4 d5
A44	Pawn Thrust, Benoni; A44	1.d4 c5 2.d5 e5
C00	Pelikan Variation, French	1.e4 e6 2.Nc3 d5 3.f4
B33	Pelikan Variation, Sicilian	1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e5 6.Ndb5 d6
A09	Penguin Variation, Reti	1.Nf3 d5 2.c4 d4 3.Rg1
A61	Penrose Variation, Benoni	1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.Nf3 g6 7.Bd3
B81	Perenyi Gambit, Sicilian	1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e6 6.Be3 a6 7.g4 e5 8.Nf5 g6 9.g5
C56	Perreux Variation, Two Knights Defense	1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.d4 exd4 5.Ng5
A40	Perrin Variation	1.d4 e6 2.c4 b6 3.e4 Bb7 4.Bd3 Nc6
C01	Perseus Gambit, French	1.e4 e6 2.d4 d5 3.Nf3
D00	Peters Attack, BDG	1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 exf3 5.Nxf3 g6 6.Ne5
C42	Petroff Defense; Russian Defense; C42	1.e4 e5 2.Nf3 Nf6
A46	Petrosian Gambit	1.d4 Nf6 2.Nf3 e6 3.Bg5 c5 4.e3 b6 5.d5
D91	Petrosian System, Grunfeld; D91	1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.Bg5
A56	Petrosian System; Czech Benoni Defense	1.d4 Nf6 2.c4 c5 3.d5 e5
C16	Petrosian Variation, French	1.e4 e6 2.d4 d5 3.Nc3 Bb4 4.e5 Qd7
E92	Petrosian Variation, KID	1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 O-O 6.Be2 e5 7.d5
D55	Petrosian Variation, QGD	1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 O-O 6.Nf3 h6 7.Bxf6 Bxf6 8.Rc1 c6 9.Bd3 Nd7 10.O-O dxc4
E12	Petrosian Variation, QID	1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.a3
C30	Petrov's Defense, KGD	1.e4 e5 2.f4 Nf6
A00	Pfeiffer Gambit, Dunst	1.Nc3 d5 2.f4 d4 3.Ne4 e5
D00	Pfrang Gambit, BDG	1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 e6 5.fxe4 Bb4 6.Bd3 Bxc3+ 7.bxc3 Nxe4 8.Be3
C41	Philidor Counter Attack	1.e4 e5 2.Nf3 d6 3.d4 f5
C25	Philidor Countergambit, Vienna	1.e4 e5 2.Nc3 Nc6 3.d4 f5
C41	Philidor Defense; C41	1.e4 e5 2.Nf3 d6
C21	Philidor Gambit	1.e4 e5 2.d4 d6 3.dxe5 Bd7
C41	Philidor Gambit	1.e4 e5 2.Nf3 d6 3.d4 Bd7
C38	Philidor Gambit, KGA	1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Bc4 Bg7 5.h4
B07	Philidor Gambit, Pirc	1.e4 d6 2.d4 e5 3.dxe5 Bd7
C23	Philidor Variation, Bishop	1.e4 e5 2.Bc4 Bc5 3.c3
B00	Pickering (Goldsmith) Defense	1.e4 h5
B00	Picklepuss Defense	1.e4 h5 2.d4 Nf6
C31	Pickler Gambit, KGD	1.e4 e5 2.f4 d5 3.exd5 c6 4.dxc6 Bc5
C52	Pierce Defense, Evans	1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.b4 Bxb4 5.c3 Ba5 6.d4 exd4
C25	Pierce Gambit, Vienna	1.e4 e5 2.Nc3 Nc6 3.f4 exf4 4.Nf3 g5 5.d4
D00	Pietrowsky Variation, BDG	1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 exf3 5.Nxf3 Nc6
D55	Pillsbury Attack, QGD	1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 O-O 6.Nf3 b6 7.Bd3 Bb7 8.cxd5 exd5 9.Ne5
A41	Pillsbury Defense; A41; Rat Defense	1.d4 d6
C49	Pillsbury Variation, 4 Knights	1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 4.Bb5 Bb4 5.O-O O-O 6.d3 d6 7.Bg5 Ne7
D63	Pillsbury Variation, QGD	1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 O-O 6.Nf3 Nbd7 7.Rc1 b6 8.cxd5 exd5 9.Bd3
C67	Pillsbury Variation, Ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 Nf6 4.O-O Nxe4 5.d4 Be7 6.Qe2 Nd6 7.Bxc6+ bxc6 8.dxe5 Nb7 9.b3
D40	Pillsbury Variation, Semi-Tarrasch	1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c5 5.Bg5
C90	Pilnik Variation, Ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 d6 8.c3 O-O 9.d3
D12	Pin Defense, Slav	1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.e3 Bg4
B20	Pin Defense, Smith-Morra Accepted, Sicilian	1.e4 c5 2.d4 cxd4 3.c3 dxc3 4.Nxc3 Nc6 5.Nf3 e6 6.Bc4 Bb4
B41	Pin Variation; Sicilian CounterAttack	1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Bb4
C00	Pinova Gambit	1.e4 e6 2.b4 Bxb4 3.e5
B00	Pirc Connection, Nimzovich Defense	1.e4 Nc6 2.d4 g6
B07	Pirc Defense	1.e4 d6 2.d4 Nf6
E39	Pirc Variation, Nimzo-Indian; E39	1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Qc2 c5 5.dxc5 O-O
D48	Pirc Variation, QGD	1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.e3 Nbd7 6.Bd3 dxc4 7.Bxc4 b5 8.Bd3 a6 9.e4 b4
B06	Pirc; Robatsch; Modern; King Pawn Fianchetto; B06	1.e4 g6
B07	Pirc; Ufimtsev; Antal Defense	1.e4 d6 2.d4 Nf6 3.Nc3 g6
A02	Platz Gambit, Bird	1.f4 e5 2.fxe5 Ne7
B62	Podebrady Variation, Sicilian	1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Bg5 e6 7.Nb3
D00	Pohlmann Variation, BDG	1.d4 d5 2.e4 dxe4 3.f3 f5
B97	Poisoned Pawn Accepted, Najdorf Sicilian	1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Bg5 e6 7.f4 Qb6 8.Qd2 Qxb2
C19	Poisoned Pawn Variation, French Winawer	1.e4 e6 2.d4 d5 3.Nc3 Bb4 4.e5 c5 5.a3 Bxc3+ 6.bxc3 Ne7 7.Qg4
C40	Poisoned Pawn Variation, Latvian	1.e4 e5 2.Nf3 f5 3.Bc4 fxe4 4.Nxe5 Qg5 5.d4 Qxg2
B97	Poisoned Pawn Variation, Najdorf Sicilian; B97	1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Bg5 e6 7.f4 Qb6
D02	Poisoned Pawn Variation, QP	1.d4 d5 2.Nf3 Nf6 3.Bf4 c5 4.e3 Qb6 5.Nc3
B97	Poisoned Pawn Variation, Sicilian	1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Bg5 e6 7.f4 Qb6 8.Qd2
A45	Poisoned Pawn Variation, Trompowsky	1.d4 Nf6 2.Bg5 c5 3.d5 Qb6 4.Nc3
C58	Polerio Defense, Two Knights; C58	1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.Ng5 d5 5.exd5 Na5
C40	Polerio-Svedenborg Variation, Latvian	1.e4 e5 2.Nf3 f5 3.Bc4 fxe4 4.Nxe5 d5
D78	Polgar Variation, Neo-Grunfeld	1.d4 Nf6 2.c4 g6 3.g3 d5 4.Bg2 Bg7 5.Nf3 O-O 6.O-O Nc6
A40	Poli Gambit	1.d4 e6 2.c4 b6 3.e4 Bb7 4.f3 f5 5.exf5 Nh6
D00	Polish Attack, BDG	1.d4 d5 2.e4 dxe4 3.Nc3 e6 4.f3 Bf5 5.Bg5
A40	Polish Defense	1.d4 b5
A46	Polish Defense	1.d4 Nf6 2.Nf3 b5
A04	Polish G; Dalesio G; Pirc-Lisitsin G	1.Nf3 f5 2.e4 fxe4 3.Ng5
A00	Polish Gambit, Anderssen's Opening	1.a3 a5 2.b4
D00	Polish Gambit, BDG	1.d4 d5 2.e4 dxe4 3.Nc3
B27	Polish Gambit, Sicilian	1.e4 c5 2.Nf3 b5
A00	Polish Spike	1.b4 Nf6 2.Bb2 g6 3.g4
A40	Polish Variation	1.e4 g6 2.d4 Bg7 3.c4 c5 4.Nf3 Qb6
B00	Polish Variation, St George Defense	1.e4 a6 2.d4 b5 3.Nf3 Bb7 4.Bd3 e6
A00	Polish; Orangutan; Sokolsky; Hunt	1.b4
C14	Pollock Variation, French	1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bg5 Be7 5.e5 Nfd7 6.Bxe7 Qxe7 7.Qg4
C25	Polluck Gambit, Vienna	1.e4 e5 2.Nc3 Nf6 3.g3 Bc5 4.Bg2 Nc6 5.Nge2 d5 6.exd5
E12	Polovodin Gambit, QID	1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.Nc3 Bb7 5.a3 d5 6.cxd5 Nxd5 7.e4
E17	Polugaevsky Gambit, QID	1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3 Bb7 5.Bg2 Be7 6.O-O O-O 7.d5 exd5 8.Nh4
B42	Polugaevsky Variation, Sicilian	1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 a6 5.Bd3 Bc5
B96	Polugaevsky; Accelerated Najdorf	1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Bg5 e6 7.f4 b5
E72	Pomar System, KID	1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.g3 O-O 6.Bg2 e5 7.Nge2
E60	Pomar Variation, KID	1.d4 Nf6 2.c4 g6 3.g3 Bg7 4.Bg2 O-O 5.Nge2
B47	Ponomariov Gambit, Sicilian	1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nc6 5.Nc3 Qc7 6.Ndb5 Qb8 7.Be3 a6 8.Bb6
C24	Ponziani Center Gambit, Bishop	1.e4 e5 2.Bc4 Nf6 3.d4
C44	Ponziani Counter-Gambit	1.e4 e5 2.Nf3 Nc6 3.c3 f5
C44	Ponziani; Staunton; English Knights	1.e4 e5 2.Nf3 Nc6 3.c3
C57	Ponziani-Steintz Gambit, Two Knights	1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.Ng5 Nxe4
A10	Porcupine Variation, English	1.c4 f5 2.e4 fxe4 3.Nc3 Nf6 4.g4
D31	Portisch Gambit, Semi-Slav	1.d4 d5 2.c4 e6 3.Nc3 c6 4.e3 f5 5.g4
B23	Portland Attack, Sicilian	1.e4 c5 2.Nc3 Nc6 3.d3 g6 4.g4
B01	Portuguese Gambit, Center Counter	1.e4 d5 2.exd5 Nf6 3.d4 Bg4 4.f3 Bf5 5.Bb5+ Nbd7
C20	Portuguese Opening	1.e4 e5 2.Bb5
B01	Portuguese Variation, Center Counter	1.e4 d5 2.exd5 Nf6 3.d4 Bg4
D35	Positional Variation, Exchange Variation, QGD	1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.cxd5 exd5 5.Bg5
A06	Potato, Zukertort	1.Nf3 d5 2.a4
C45	Potter Variation, Scotch	1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Nxd4 Bc5 5.Nb3
A40	Pozarek Gambit	1.d4 Nc6 2.c4 e5 3.dxe5 Nxe5 4.Nc3 Nxc4
D33	Prague Variation, QGD	1.d4 d5 2.c4 e6 3.Nc3 c5 4.cxd5 exd5 5.Nf3 Nc6 6.g3 Nf6
A80	Pretzel Gambit, Dutch	1.d4 f5 2.Qd3 Nf6 3.g4
D21	Prianishenmo Gambit, QGA	1.d4 d5 2.c4 dxc4 3.Nf3 c5 4.d5 Nf6 5.Nc3 e6 6.e4 exd5 7.e5
A24	Prickly Pawn Pass System, English	1.c4 e5 2.Nc3 Nf6 3.g3 g6 4.Bg2 Bg7 5.d3 d6 6.e4 O-O 7.Nge2 c6 8.O-O a6
D50	Primitive Pillsbury Variation, QGD	1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 c5 5.Nf3 cxd4 6.Qxd4
B12	Prins Attack, Caro-Kann	1.e4 c6 2.d4 d5 3.e5 Bf5 4.b4
D97	Prins Variation, Grunfeld	1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.Qb3 dxc4 6.Qxc4 O-O 7.e4 Na6
A03	Prokofiev Gambit, Bird	1.f4 d5 2.e4 dxe4 3.d3
C47	Provincial Opening, 4 Knights	1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 4.a3 d6 5.h3
C57	Prussian Game; Knight Attack, Two Knights; C57	1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.Ng5
A49	Przepiorka Variation; A49	1.d4 Nf6 2.Nf3 g6 3.g3
B06	Pseudo-Austrian Attack	1.e4 g6 2.d4 Bg7 3.Nc3 d6 4.f4
A46	Pseudo-Benko Gambit	1.d4 Nf6 2.Nf3 c5 3.d5 b5
D02	Pseudo-Catalan	1.d4 d5 2.Nf3 Nf6 3.g3
D06	Pseudo-Chigorin, QGD	1.d4 d5 2.c4 Bf5 3.Nc3 e6 4.Nf3 Nc6
A00	Pseudo-Diemer Gambit, Dunst	1.Nc3 d5 2.e4 dxe4 3.f3 exf3 4.Qxf3
A48	Pseudo-King's Indian Variation; A48	1.d4 Nf6 2.Nf3 g6
C88	Pseudo-Marshall Var, Ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 Bb7 8.c3 d5 9.exd5 Nxd5 10.Nxe5 Nxe5
D30	Pseudo-Meran; Semi-Slav, QGD	1.d4 d5 2.c4 e6 3.Nf3 Nf6 4.e3 c6
A40	Pseudo-Saemisch	1.d4 g6 2.c4 Bg7 3.e4 d6 4.Be3 Nf6 5.f3
A57	Pseudo-Saemisch, Benko Gambit	1.d4 Nf6 2.c4 c5 3.d5 b5 4.f3
D06	Pseudo-Slav, QGD	1.d4 d5 2.c4 Bf5 3.Nc3 e6 4.Nf3 c6
B00	Pseudo-Spanish Variation	1.e4 Nc6 2.Bb5
D50	Pseudo-Tarrasch Variation, QGD	1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 c5 5.cxd5
D30	Pseudo-Tarrasch, QGD	1.d4 d5 2.c4 e6 3.Nf3 c5
A41	Pterodactyl Variation, Modern	1.d4 g6 2.c4 Bg7 3.Nc3 d6 4.e4 c5 5.Nf3 Qa5
B06	Pterodactyl, Pirc	1.e4 g6 2.d4 Bg7 3.Nc3 c5
B20	Push Variation, Smith-Morra Gambit, Sicilian	1.e4 c5 2.d4 cxd4 3.c3 d3
A50	Pyrenees Gambit	1.d4 Nf6 2.c4 b5
C37	Quaade; Taylor Variation, KGA	1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Nc3
D06	Queen Attack, Baltic Defens, QGD	1.d4 d5 2.c4 Bf5 3.Nc3 e6 4.Qb3
B20	Queen Fianchetto Variation, Sicilian	1.e4 c5 2.b3 b6
A40	Queen Fianchetto, Queen Pawn Game	1.d4 b6
A06	Queen Pawn Defense, Zukertort; A06	1.Nf3 d5
A40	Queen Pawn Fianchetto	1.d4 g6
D00	Queen Pawn Game; Close Opening; D00	1.d4 d5
A40	Queen Pawn Opening; A40	1.d4
D25	Queen's Gambit Accepted Deferred	1.d4 d5 2.Nf3 Nf6 3.c4 dxc4
D20	Queen's Gambit Accepted; D20	1.d4 d5 2.c4 dxc4
D02	Queen's Gambit Reversed; Krause Variation	1.d4 d5 2.Nf3 c5
D06	Queen's Gambit; Aleppo Gambit; D06	1.d4 d5 2.c4
E12	Queen's Indian Defense; E12	1.d4 Nf6 2.c4 e6 3.Nf3 b6
A50	Queen's Indian Defense; Saemisch-Indian	1.d4 Nf6 2.c4 b6
A18	Queen's Indian Formation, English	1.c4 Nf6 2.Nc3 e6 3.Nf3 b6
C30	Queen's Knight Defense, KGD	1.e4 e5 2.f4 Nc6
A84	Queen's Knight Variation, Dutch	1.d4 f5 2.c4 Nf6 3.Nc3
D31	Queen's Knight Variation, QGD; D31	1.d4 d5 2.c4 e6 3.Nc3
C00	Queen's Knight, French	1.e4 e6 2.Nc3
C40	Queen's Pawn Counter-Gambit; Elephant Gambit	1.e4 e5 2.Nf3 d5
C25	Quelle Gambit, Vienna	1.e4 e5 2.Nc3 Nc6 3.f4 Bc5 4.fxe5 d6
A57	Quiet Line, Benko Gambit	1.d4 Nf6 2.c4 c5 3.d5 b5 4.Nd2
A28	Quiet Line, English	1.c4 e5 2.Nc3 Nc6 3.Nf3 Nf6 4.e3
E15	Quiet Line, QID	1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3 Ba6 5.b3
B28	Quiet System, O'Kelly Sicilian	1.e4 c5 2.Nf3 a6 3.d3
B08	Quiet System, Pirc	1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.Nf3 Bg7 5.Be2
D30	Quiet Variation, Semi-Slav	1.d4 d5 2.c4 e6 3.Nf3 Nf6 4.e3 c6 5.Nbd2
D11	Quiet Variation, Slav	1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.e3
B27	Quinteros Variation, Sicilian	1.e4 c5 2.Nf3 Qc7
C20	Radisch Gambit	1.e4 e5 2.d3 Nf6 3.f4 Bc5
E40	Ragozin Variation, Nimzo-Indian	1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 Nc6 5.Nf3 O-O 6.Bd3 d5 7.O-O dxc4
E20	Ragozin Variation, Nimzo-Indian	1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Nf3 d5
E51	Ragozin Variation, Nimzo-Indian; E51	1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Nf3 d5
D38	Ragozin Variation, QGD; D38	1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 Bb4
A42	Randspringer Variation	1.d4 g6 2.c4 Bg7 3.Nc3 d6 4.e4 f5
C48	Ranken Variation, 4 Knights	1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 4.Bb5 a6 5.Bxc6
A80	Raphael Variation, Dutch	1.d4 f5 2.Nc3
A45	Raptor Variation, Trompowsky	1.d4 Nf6 2.Bg5 Ne4 3.h4
C10	Rasa-Studier Gambit, French	1.e4 e6 2.d4 d5 3.Nc3 dxe4 4.Be3
D00	Rasa-Studier Variation, BDG	1.d4 d5 2.e4 dxe4 3.Nc3 e6 4.Be3
D00	Rasmussen Attack, BDG	1.d4 d5 2.e4 dxe4 3.Nc3 e5 4.Nge2
D60	Rauzer Variation, QGD	1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 O-O 6.Nf3 Nbd7 7.Qb3
C98	Rauzer Variation, Ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 d6 8.c3 O-O 9.h3 Na5 10.Bc2 c5 11.d4 Qc7 12.Nbd2 Nc6 13.dxe5 dxe5 14.a4
B63	Rauzer Variation, Sicilian; B63	1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Bg5 e6 7.Qd2
A00	Regan Variation	1.g3 d5 2.Bg2 e5 3.d4
B14	Reifir-Spielmann Line, Caro-Kann	1.e4 c6 2.d4 d5 3.exd5 cxd5 4.c4 Nf6 5.Nc3 Nc6 6.Bg5 Qb6
C41	Rellstab Variation, Philidor	1.e4 e5 2.Nf3 d6 3.d4 Nf6 4.dxe5 Nxe4 5.Qd5
C33	Requena Gambit, KGA	1.e4 e5 2.f4 exf4 3.Nc3 Qh4+
D83	Reshevsky Gambit, Grunfeld	1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Bf4 Bg7 5.e3 O-O 6.Rc1 c5 7.dxc5 Qa5
E46	Reshevsky Variation, Nimzo-Indian	1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Ne2
E46	Reshevsky Variation, Nimzo-Indian	1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Nge2
D36	Reshevsky Variation, QGD; D36	1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.cxd5 exd5 5.Bg5 c6 6.Qc2
C32	Reti (Charousek) Variation, KGD	1.e4 e5 2.f4 d5 3.exd5 e4 4.d3
C00	Reti (Horwitz) Variation, French	1.e4 e6 2.b3
A09	Reti Gambit Accepted	1.Nf3 d5 2.c4 dxc4
A09	Reti Polonaise	1.Nf3 d5 2.c4 d4 3.b4
B28	Reti System, O'Kelly Sicilian	1.e4 c5 2.Nf3 a6 3.g3
D34	Reti Variation, QGD	1.d4 d5 2.c4 e6 3.Nc3 c5 4.cxd5 exd5 5.Nf3 Nc6 6.g3 Nf6 7.Bg2 Be7 8.O-O O-O 9.dxc5 Bxc5 10.Na4
B41	Reti Variation, Sicilian	1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 a6 5.c4
A09	Reti; Landstrasser G; Wolf G; A09	1.Nf3 d5 2.c4
A04	Reti; Zukertort; A04	1.Nf3
C00	Reti-Spielmann Attack, French	1.e4 e6 2.g3
B11	Retreat Line, Mindeno Variation, Caro-Kann	1.e4 c6 2.Nc3 d5 3.Nf3 Bg4 4.h3 Bh5
C60	Retreat Variation, Ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 Nc8
B32	Retreat Variation, Sicilian	1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e5 6.Nf3
B02	Retreat; Brooklyn Variation, Alekhine	1.e4 Nf6 2.e5 Ng8
C00	Reuter Gambit, French	1.e4 e6 2.f4 d5 3.Nf3 dxe4 4.Ng5
A00	Reversed Alekhine	1.g3 e5 2.Nf3
A45	Reversed Chigorin Defense	1.d4 Nf6 2.Nc3 c5
A25	Reversed Closed Sicilian, English; A25	1.c4 e5 2.Nc3 Nc6
A23	Reversed Dragon, English	1.c4 e5 2.Nc3 Nf6 3.g3 d5
A06	Reversed Mexican Defense, Reti	1.Nf3 d5 2.Nc3
A00	Reversed Nimzovich	1.Nc3 e5
A00	Reversed Norwegian Defense	1.g3 e5 2.Nf3 e4 3.Nh4
C00	Reversed Philidor, French	1.e4 e6 2.d3 d5 3.Nd2 Nf6 4.Ngf3 Nc6 5.Be2
A00	Reversed Rat	1.d3 e5
A00	Reversed Scaninavian, Dunst	1.Nc3 e5 2.d4 exd4 3.Qxd4 Nc6 4.Qa4
A21	Reversed Sicilian, English; A21	1.c4 e5 2.Nc3
C27	Reversed Spanish, Vienna	1.e4 e5 2.Nc3 Nf6 3.Bc4 Bb4
D48	Reynolds Variation, QGD; D48	1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.e3 Nbd7 6.Bd3 dxc4 7.Bxc4 b5 8.Bd3 a6
D48	Reynolds Variation, Semi-Slav	1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.e3 Nbd7 6.Bd3 dxc4 7.Bxc4 b5 8.Bd3 a6 9.e4 d5
C39	Rice Gambit Accepted, KGA	1.e4 e5 2.f4 exf4 3.Nf3 g5 4.h4 g4 5.Ne5 Nf6 6.Bc4 d5 7.exd5 Bd6 8.O-O Bxe5
C39	Rice Gambit, KGA	1.e4 e5 2.f4 exf4 3.Nf3 g5 4.h4 g4 5.Ne5 Nf6 6.Bc4 d5 7.exd5 Bd6 8.O-O
C52	Richardson Attack, Evans	1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.b4 Bxb4 5.c3 Ba5 6.O-O Nf6 7.d4 O-O 8.Nxe5
B00	Richter Gambit, Nimzovich Defense	1.e4 Nc6 2.d4 d5 3.Nc3 dxe4 4.d5 Nb8 5.f3
B01	Richter Variation, Center Counter	1.e4 d5 2.exd5 Nf6 3.d4 Nxd5 4.Nf3 g6
C73	Richter Variation, Ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 d6 5.Bxc6+ bxc6 6.d4
C80	Richter Variation, Ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Nxe4 6.d4 b5 7.d5
D01	Richter Variation, Veresov	1.d4 d5 2.Nc3 Nf6 3.Bg5 Bf5 4.f3
A00	Richter-Grob Gambit	1.g4 d5 2.Bg2 c6 3.c4 dxc4 4.b3
B60	Richter-Rauzer Variation, Sicilian; B60	1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Bg5
D01	Richter-Veresov Opening; D01	1.d4 d5 2.Nc3 Nf6 3.Bg5
B00	Riemann Defense, Nimzovich Defense	1.e4 Nc6 2.d4 e5 3.dxe5 Nxe5 4.f4 Nc6
C80	Riga Variation, Ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Nxe4 6.d4 exd4
A01	Ringelbach Gambit, Larsen	1.b3 e5 2.Bb2 f5 3.e4
C67	Rio de Janeiro Variation, Ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 Nf6 4.O-O Nxe4 5.d4 Be7
C67	Rio Gambit Accepted, Ruy Lopez; C67	1.e4 e5 2.Nf3 Nc6 3.Bb5 Nf6 4.O-O Nxe4
D00	Ritter Defense, BDG	1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 exf3 5.Nxf3 b6
E16	Riumin Variation, QID	1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3 Bb7 5.Bg2 Bb4+ 6.Bd2 Be7
B20	Rivadavia Gambit, Sicilian	1.e4 c5 2.d4 cxd4 3.c3
C39	Riviere Variation, KGA	1.e4 e5 2.f4 exf4 3.Nf3 g5 4.h4 g4 5.Ne5 Nf6 6.Nxg4 d5
B28	Robatsch Line, Sicilian	1.e4 c5 2.Nf3 a6 3.c4 d6
A13	Romanishin Gambit, English	1.c4 e6 2.Nf3 Nf6 3.g3 a6 4.Bg2 b5
A28	Romanishin Variation, English	1.c4 e5 2.Nc3 Nc6 3.Nf3 Nf6 4.e3 Bb4 5.Qc2 Bxc3
A15	Romanishin Variation, English	1.c4 Nf6 2.Nf3 e6 3.g3 a6
E20	Romanishin Variation, Nimzo-Indian	1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Nf3 c5 5.g3 O-O 6.Bg2
E35	Romanishin Variation, Nimzo-Indian	1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Qc2 d5 5.cxd5 exd5 6.Nf3 Qf5
C95	Romanishin Variation, Ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 d6 8.c3 O-O 9.h3 Nb8 10.d4 Nbd7 11.Nbd2 Bb7 12.Bc2 Re8 13.Nf1 Bf8 14.Bg5
C45	Romanishin Variation, Scotch	1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Nxd4 Bc5 5.Nb3 Bb4+
E23	Romanovsky Gambit, Nimzo-Indian; E23	1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Qb3 c5 5.dxc5 Nc6
E25	Romanovsky Variation, Nimzo-Indian	1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.a3 Bxc3+ 5.bxc3 c5 6.f3 d5 7.cxd5 Nxd5 8.dxc5 f5
C87	Romanovsky Variation, Ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 d6 7.c3 O-O 8.d4 Bd7 9.Nbd2 exd4 10.cxd4 Nb4
C68	Romanovsky Variation, Ruy Lopez Exchange	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Bxc6 bxc6 5.Nc3 f6 6.d3
A00	Romford Counter-Gambit, Grob	1.g4 d5 2.Bg2 Bxg4 3.c4 d4
D46	Romi Variation, QGD	1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.e3 Nbd7 6.Bd3 Bb4
B07	Roscher Gambit, Pirc	1.e4 d6 2.d4 Nf6 3.Nf3
C88	Rosen Attack, Ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 d6 8.d4
D21	Rosenthal Variation, QGA	1.d4 d5 2.c4 dxc4 3.Nf3 e6
C67	Rosenthal Variation, Ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 Nf6 4.O-O Nxe4 5.d4 a6
C46	Rosenthal Variation, Three Knights	1.e4 e5 2.Nf3 Nc6 3.Nc3 g6 4.d4 exd4 5.Nd5
C39	Rosenthal; Stockwhip Var, KGA	1.e4 e5 2.f4 exf4 3.Nf3 g5 4.h4 g4 5.Ne5 Qe7
C50	Rosentreter Gambit, Italian	1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.d4
C37	Rosentreter Gambit, KGA	1.e4 e5 2.f4 exf4 3.Nf3 g5 4.d4
C37	Rosentreter-Testa Gambit, KGA	1.e4 e5 2.f4 exf4 3.Nf3 g5 4.d4 g4 5.Bxf4
C21	Ross Gambit, Center	1.e4 e5 2.d4 exd4 3.Bd3
A04	Ross Gambit, Zukertort	1.Nf3 e5
B30	Rossolimo (Nezmetdinov) Variation, Sicilian; B30	1.e4 c5 2.Nf3 Nc6 3.Bb5
A40	Rossolimo Variation	1.d4 g6 2.c4 Bg7 3.e4 d6 4.Nf3 Bg4
B06	Rossolimo Variation, Modern Defense	1.e4 g6 2.d4 Bg7 3.Nf3 d6 3.c4 Bg4
C60	Rotary-Albany Gambit, Ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 b6
D12	Rotterdam Variation, Slav	1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.e3 Bf5 5.cxd5 cxd5 6.Qb3
C50	Rousseau Gambit	1.e4 e5 2.Nf3 Nc6 3.Bc4 f5
E83	Ruban Variation, KID	1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f3 O-O 6.Be3 Nc6 7.Nge2 Rb8
D05	Rubinstein Attack, Colle	1.d4 d5 2.Nf3 Nf6 3.e3 e6 4.Bd3 c5 5.b3
D64	Rubinstein Attack, Orthodox Defense, QGD;  D64	1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 O-O 6.Nf3 Nbd7 7.Rc1 c6 8.Qc2
C30	Rubinstein Countergambit, KGD	1.e4 e5 2.f4 Bc5 3.Nf3 d6 4.c3 f5
C48	Rubinstein Variation, 4 Knights	1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 4.Bb5 Nd4
E10	Rubinstein Variation, Blumenfeld	1.d4 Nf6 2.c4 e6 3.Nf3 c5 4.d5 b5 5.e4
A52	Rubinstein Variation, Budapest	1.d4 Nf6 2.c4 e5 3.dxe5 Ng4 4.Bf4
B13	Rubinstein Variation, Caro-Kann	1.e4 c6 2.d4 d5 3.exd5 cxd3 4.Bd3 Nc6 5.c3 Nf6 6.Bf4
A84	Rubinstein Variation, Dutch	1.d4 f5 2.c4 e6 3.Nc3
C10	Rubinstein Variation, French	1.e4 e6 2.d4 d5 3.Nc3 dxe4
C14	Rubinstein Variation, French	1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bg5 Be7 5.e5 Nfd7 6.Bxe7 Qxe7 7.Qd2
C39	Rubinstein Variation, KGA	1.e4 e5 2.f4 exf4 3.Nf3 g5 4.h4 g4 5.Ne5 Nf6 6.d4
E40	Rubinstein Variation, Nimzo-Indian; E40	1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3
E42	Rubinstein Variation, Nimzo-Indian; E42	1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 c5 5.Ne2
D61	Rubinstein Variation, Orthodox Defense, QGD; D61	1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 O-O 6.Nf3 Nbd7 7.Qc2
D20	Rubinstein Variation, QGA	1.d4 d5 2.c4 dxc4 3.e4 c5
D27	Rubinstein Variation, QGA; D27	1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.e3 e6 5.Bxc4 c5 6.O-O a6
D63	Rubinstein Variation, QGD	1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 O-O 6.Nf3 Nbd7 7.Rc1 c6
E16	Rubinstein Variation, QID	1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3 Bb7 5.Bg2 c5 6.d5 exd5 7.Nh4
A34	Rubinstein Variation, Symmetrical English	1.c4 c5 2.Nc3 Nf6 3.g3 d5 4.cxd5 Nxd5 5.Bg2 Nc7
D45	Rubinstein; anti-Meran	1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.e3 Nbd7 6.Ne5
D34	Rubinstein; Normal Position, QGD	1.d4 d5 2.c4 e6 3.Nc3 c5 4.cxd5 exd5 5.Nf3 Nc6 6.g3 Nf6 7.Bg2 Be7 8.O-O O-O
C02	Ruisdonk Gambit, French	1.e4 e6 2.d4 d5 3.e5 c5 4.Nf3 cxd4 5.Bd3
C79	Russian Defense, Ruy Lopez; C79; Lasker Defense	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O d6
D27	Russian Gambit, QGA	1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.e3 e6 5.Bxc4 c5 6.O-O a6 7.e4
C42	Russian Three Knights Var, Petroff	1.e4 e5 2.Nf3 Nf6 3.Nc3
D96	Russian Variation, Grunfeld; D96	1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.Qb3
C60	Ruy Lopez; Spanish Opening; C60	1.e4 e5 2.Nf3 Nc6 3.Bb5
A04	Rydel-Bloodgood Gambit	1.Nf3 f5 2.e4 exf4 3.Ne5
D00	Ryder Variation, BDG	1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 exf3 5.Qxf3
D20	Saduleto Variation, QGA; Central Variation, QGA	1.d4 d5 2.c4 dxc4 3.e4
B02	Saemisch Attack, Alekhine	1.e4 Nf6 2.e5 Nd5 3.Nc3
E51	Saemisch Deferred, Nimzo-Indian	1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Nf3 d5 6.a3
E80	Saemisch Variation, KID; E80	1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f3
E24	Saemisch Variation, Nimzo-Indian; E24	1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.a3
E26	Saemisch Variation, Nimzo-Indian; E26	1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.a3 Bxc3+ 5.bxc3 c5 6.e3
D35	Saemisch Variation, QGD	1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.cxd5 exd5 5.Nf3 Nbd7 6.Bf4
E15	Saemisch Variation, QID	1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3 Bb7 5.Bg2 c5
D06	Salvio Countergambit, QGD	1.d4 d5 2.c4 c5 3.dxc5 d4
C37	Salvio Gambit, KGA	1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Bc4 g4 5.Ne5
B31	San Francisco Gambit, Sicilian	1.e4 c5 2.Nf3 Nc6 3.Bb5 Na5 4.b4
B00	San Jorge Variation	1.e4 a6 2.d4 b5 3.Nf3 Bb7 4.Bd3 d6 5.O-O g6 6.c3 Bg7
B00	San Jorge Variation	1.e4 a6 2.d4 e6
E37	San Remo Variation, Nimzo-Indian	1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Qc2 d5 5.a3 Bxc3+ 6.Qxc3 Ne4 7.Qc2 Nc6 8.e3 e5
E23	San Remo Variation, Nimzo-Indian; Stahlberg Variation	1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Qb3 c5 5.dxc5 Nc6 6.Nf3 Ne4 7.Bd2 Nxc5
D41	San Sebastian Variation, QGD	1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c5 5.cxd5 Nxd5 6.e4 Nxc3 7.bxc3 cxd4 8.cxd4 Bb4+ 9.Bd2 Bxd2+
B00	Sanky-Georg Gambit, St George	1.e4 a6 2.d4 e6 3.c4 b5
C37	Santa Maria Defense, KGA	1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Bc4 g4 5.Ne5  Qh4+ 6.Kf1 Nf6
B20	Santasiere Wing Gambit, Sicilian	1.e4 c5 2.b4 cxb4 3.c4
A06	Santasiere's Folly, Reti	1.Nf3 d5 2.b4
E60	Santassiere Variation, KID	1.d4 Nf6 2.c4 g6 3.Nf3 Bg7 4.b4
A00	Saragossa; Hempel's Opening	1.c3
D00	Sarratt Attack	1.d4 d5 2.Bf4
C37	Sarratt Defense, KGA	1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Bc4 g4 5.O-O gxf3 6.Qxf3 Qf6
C60	Sawyer's Gambit, Ruy Lopez; Spanish Countergambit	1.e4 e5 2.Nf3 Nc6 3.Bb5 d5
B20	Scandanavian Formation, Smith-Morra, Sicilian	1.e4 c5 2.d4 cxd4 3.c3 d5
B02	Scandanavian Variation, Alekhine	1.e4 Nf6 2.Nc3 d5
B00	Scandanavian Variation, Nimzovich Defense	1.e4 Nc6 2.d4 d5
C36	Scandinavian Variation, KGA; Modern Defense, KGA; C36	1.e4 e5 2.f4 exf4 3.Nf3 d5
C34	Schallop Defense, KGA	1.e4 e5 2.f4 exf4 3.Nf3 Nf6
D12	Schallopp Defense, Slav; D12	1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.e3 Bf5
D32	Schara-Hennig; Duisburg Gambit, QGD	1.d4 d5 2.c4 e6 3.Nc3 c5 4.cxd5 cxd4
B80	Scheveingen Variation, Sicilian; B80	1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e6
B20	Scheveningen Formation, Smith-Morra Accepted	1.e4 c5 2.d4 cxd4 3.c3 dxc3 4.Nxc3 Nc6 5.Nf3 d6 6.Bc4 e6
B83	Scheveningen Variation, Sicilian; B83	1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e6 6.Be2
A00	Schiffler-Sokolsky; Tartakower Gambit	1.b4 e5 2.Bb2 f6 3.e4 Bxb4
B01	Schiller-Pytel Variation, Center Counter	1.e4 d5 2.exd5 Qxd5 3.Nc3 Qd6 4.d4 c6
C21	Schlechter Defense, Center	1.e4 e5 2.d4 exd4 3.c3 dxc3 4.Bc4 cxb2 5.Bxb2 d5
E52	Schlechter Defense, Nimzo-Indian; E52	1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Nf3 d5 6.Bd3 b6
C80	Schlechter Defense, Ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Nxe4 6.d4 b5 7.Bb3 d5 8.a4 Nxd4
A02	Schlechter Gambit, Bird	1.f4 e5 2.fxe5 Nc6
C01	Schlechter Variation, French	1.e4 e6 2.d4 d5 3.Bd3
D80	Schlechter Variation, Grunfeld	1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.e3 Bg7 5.Nf3 O-O 6.Bd3 c6
D80	Schlechter Variation, Grunfeld	1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.e3 c6
C41	Schlechter Variation, Philidor	1.e4 e5 2.Nf3 d6 3.d4 Nd7 4.Bc4 c6 5.Nc3
B08	Schlechter Variation, Pirc	1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.Nf3 Bg7 5.h3
C86	Schlechter Variation, Ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Qe2 b5 7.Bb3 O-O 8.c3 d5
D15	Schlechter Variation, Slav	1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 g6
C46	Schlechter Variation, Three Knights	1.e4 e5 2.Nf3 Nc6 3.Nc3 Bb4 4.Nd5 Nf6
A43	Schlenker Defense, Benoni	1.d4 c5 2.dxc5 Na6
C70	Schliemann Defense Deferred, Ruy	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 f5
C63	Schliemann; Jaenisch Var, Ruy Lopez; C63	1.e4 e5 2.Nf3 Nc6 3.Bb5 f5
C47	Schmid Gambit, Four Knights	1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 4.d4 exd4 5.Nxd4 Nxe4
B04	Schmid Variation, Alekhine	1.e4 Nf6 2.e5 Nd5 3.d4 d6 4.Nf3 Nb6
A43	Schmid Variation, Benoni	1.d4 c5 2.d5 d6 3.Nc3 g6
C44	Schmidt Attack, Ponziani	1.e4 e5 2.Nf3 Nc6 3.c3 f5 4.d4 d6 5.d5
C45	Schmidt Var; Scotch Four Knights	1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Nxd4 Nf6 5.Nc3
A00	Schneider Gambit	1.h4 g5
A47	Schnepper Gambit	1.d4 Nf6 2.Nf3 b6 3.c3 e5
C63	Schoenemann Attack, Ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 f5 4.d4
B23	Schofman Variation, Sicilian	1.e4 c5 2.Nc3 Nc6 3.f4 g6 4.Nf3 Bg7 5.Bc4 e6 6.f5
C30	Schubert Variation, KGD	1.e4 e5 2.f4 Qf6 3.Nc3 Qxf4 4.d4
A00	Schuhler Gambit, Polish	1.b4 c6 2.Bb2 a5 3.b5 cxb5 4.e4
C34	Schulder Gambit, KGA	1.e4 e5 2.f4 exf4 3.Nf3 d6 4.b4
C52	Schulen Defense, Evans	1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.b4 Bxb4 5.c3 Ba5 6.d4 exd4 7.O-O b5
C38	Schultz Variation, KGA	1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Bc4 Bg7 5.h4 h6 6.d4 d6 7.Qd3
A10	Schulz Gambit, English	1.c4 d5 2.cxd5 Nf6
C33	Schurig Gambit, KGA	1.e4 e5 2.f4 exf4 3.Bb5
D00	Schuttler Defense, BDG	1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 exf3 5.Nxf3 Nbd7
C15	Schwarz's Line, French	1.e4 e6 2.d4 d5 3.Nc3 Bb4 4.Bd2 Ne7 5.Nb1
C21	Scippler Gambit, Center	1.e4 e5 2.d4 exd4 3.Nf3 Bc5 4.c3 dxc3 5.Bc4
B10	Scorpion-Horus Gambit, Caro-Kann	1.e4 c6 2.Nc3 d5 3.d3 dxe4 4.Bg5
C56	Scotch Gambit	1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.d4 exd4 5.O-O
C44	Scotch Gambit	1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Bc4
C44	Scotch Game	1.e4 e5 2.Nf3 Nc6 3.d4
E00	Seirawan Attack	1.d4 Nf6 2.c4 e6 3.Bg5
B19	Seirawan Variation, Caro-Kann	1.e4 c6 2.d4 d5 3.Nc3 dxe4 4.Nxe4 Bf5 5.Ng3 Bg6 6.h4 h6 7.Nf3 Nd7 8.e5 Bh7 9.Bd3 Bxd3 10.Qxd3
E73	Semi-Averbakh System, KID	1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Be2 O-O 6.Be3
A81	Semi-Leningrad Variation, Dutch	1.d4 f5 2.g3 Nf6 3.Bg2 g6
D31	Semi-Slav Defense	1.d4 d5 2.c4 e6 3.Nc3 c6
D44	Semi-Slav Defense Accepted; D44	1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.Bg5 dxc4
D40	Semi-Tarrasch Variation, QGD; D40	1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c5
D30	Semmering Variation, Semi-Slav	1.d4 d5 2.c4 e6 3.Nf3 Nf6 4.e3 c6 5.Nbd2 Nbd7 6.Bd3 c5
C30	Senechaud Counter-Gambit, KGD	1.e4 e5 2.f4 Bc5 3.Nf3 g5
C40	Senechaud Gambit, Latvian	1.e4 e5 2.Nf3 f5 3.b4
A80	Seneschaud Gambit, Dutch	1.d4 f5 2.Bf4 e6 3.g4
A40	Seneschaud Variation, Dutch	1.d4 e6 2.Bf4 f5 3.g4
D87	Seville Variation, Grunfeld	1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.cxd5 Nxd5 5.e4 Nxc3 6.bxc3 Bg7 7.Bc4 O-O 8.Ne2 c5 9.O-O Nc6 10.Be3
D45	Shabalov Attack, Semi-Slav	1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.e3 Nbd7 6.Qc2 Bd6 7.g4
C78	Shannon Gambit, Ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O b5 6.Bb3 Bb7 7.Ng5 d5
C07	Shaposhnikov Gambit, French	1.e4 e6 2.d4 d5 3.Nd2 c5 4.exd5 Nf6
D17	Sharp Line, Wiesbaden Variation, Slav	1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 dxc4 5.a4 Bf5 6.Ne5 e6 7.f3 Bb4 8.e4
C41	Sharp Variation, Philidor	1.e4 e5 2.Nf3 d6 3.d4 Nd7 4.Bc4 Nb6
D00	Shaviliuk Gambit, QP	1.d4 d5 2.Nc3 e5
E42	Sherbakov Attack, Nimzo-Indian	1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 c5 5.Ne2 cxd4 6.exd4 O-O 7.c5
B89	Sherbakov Variation, Sicilian	1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e6 6.Bc4 Nc6 7.Be3 Be7 8.Bb3 O-O 9.O-O Na5 10.f4 b6
B22	Sherzer Variation, Sicilian	1.e4 c5 2.c3 Nf6 3.e5 Nd5 4.d4 e6 5.Nf3 Nc6
C50	Shilling (Kostic) Gambit, Italian	1.e4 e5 2.Nf3 Nc6 3.Bc4 Nd4
A15	Shirazi Shove	1.c4 Nf6 2.g3 h5
E21	Shocron Gambit, Nimzo-Indian	1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Nf3 c5 5.d5 b5
A00	Short Spike, Grob	1.g4 d5 2.Bg2 c6 3.h3
B12	Short Variation, Caro-Kann	1.e4 c6 2.d4 d5 3.e5 Bf5 4.Nf3
D24	Showalter Variation, QGA; D24	1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.Nc3
D00	Shropshire Defense	1.d4 d5 2.Nc3 h5
D00	Siberian Attack	1.d4 d5 2.Qd3 Nc6 3.Nc3
B20	Sicilian Center Game	1.e4 c5 2.d4 cxd4
B20	Sicilian Defense; B20	1.e4 c5
B27	Sicilian Fred	1.e4 c5 2.Nf3 g6 3.d4 f5
A08	Sicilian Vartiation, KIA; A08	1.Nf3 d5 2.g3 c5
A02	Siegener Gambit, Bird	1.f4 e5 2.d4 exd4 3.Nf3 c5 4.c3
C74	Siesta Variation, Ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 d6 5.c3 f5
C37	Silberschmidt Variation, KGA	1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Bc4 g4 5.Ne5  Qh4+ 6.Kf1 Nh6
D97	Simagin (Byrne) Variation, Grunfeld	1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.Qb3 dxc4 6.Qxc4 O-O 7.e4 Nc6
D86	Simagin Improved Variation, Grunfeld	1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.cxd5 Nxd5 5.e4 Nxc3 6.bxc3 Bg7 7.Bc4 O-O 8.Ne2 Nc6
B96	Simagin Line, Najdorf Sicilian	1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Bg5 e6 7.f4 b5 8.e5 dxe5 9.fxe5 Qc7 10.Qe2
E60	Simagin Variation	1.d4 Nf6 2.c4 g6 3.g3 Bg7 4.Bg2 d6 5.Nf3 O-O 6.Nc3 Nc6 7.O-O Bg4
D86	Simagin Variation, Grunfeld	1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.cxd5 Nxd5 5.e4 Nxc3 6.bxc3 Bg7 7.Bc4 O-O 8.Ne2 b6 9.h4 Ba6
E62	Simagin Variation, KID	1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.Nf3 d6 5.g3 O-O 6.Bg2 Nc6 7.O-O Bg4
E46	Simagin Variation, Nimzo-Indian	1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Ne2 d5 6.a3 Bd6
E46	Simagin Variation, Nimzo-Indian	1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Nge2 d5 6.a3 Bd6
C95	Simagin Variation, Ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 d6 8.c3 O-O 9.h3 Nb8 10.d4 Nbd7 11.Nh4
E77	Six Pawns Attack, KID	1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6
E76	Six Pawns Attack, KID	1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f4 c5 6.d5 O-O 7.Be2 e6 8.dxe6 fxe6 9.g4 Nc6 10.h4
C80	Skipworth Gambit, Ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Nxe4 6.Re1 d5
D11	Slav Bishop's Game	1.d4 d5 2.c4 c6 3.Nf3 Bf5
D10	Slav Defense; Czech Defense, QGD; D10	1.d4 d5 2.c4 c6
D90	Slav Fianchetto	1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Nf6 5.Nc3 g6
D21	Slav Gambit, QGA	1.d4 d5 2.c4 dxc4 3.Nf3 b5
D10	Slav Pawn Game	1.d4 d5 2.c4 c6 3.e3
A84	Slav Stonewall, Dutch	1.d4 d5 2.c4 e6 3.Nc3 c6 4.e3 f5
A00	Sleipner Countergambit, Dunst	1.Nc3 d5 2.f4 d4 3.Ne4 e5 4.Nf3
A00	Sleipner Gambit, Dunst	1.Nc3 d5 2.e3 e5 3.d4 Bb4
B20	Slow Sicilian	1.e4 c5 2.Be2
C52	Slow Variation, Evans	1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.b4 Bxb4 5.c3 Ba5 6.O-O
B07	Small Center Defense	1.e4 d6 2.d4 e6
B06	Small Center Variation, Pirc	1.e4 g6 2.d4 Bg7 3.Nf3 d6 3.Nc3 e6
B00	Smith Gambit, Owen Defense	1.e4 b6 2.d4 Bb7 3.Nf3
B20	Smith-Morra Accepted, Sicilian	1.e4 c5 2.d4 cxd4 3.c3 dxc3
B28	Smith-Morra Line, O'Kelly Sicilian	1.e4 c5 2.Nf3 a6 3.d4 cxd4 4.c3
B20	Smith-Morra; Fleissig Gambit, Sic	1.e4 c5 2.d4 cxd4 3.c3
A17	Smyslov Defense, English	1.c4 Nf6 2.Nc3 d5 3.cxd5 Nxd5 4.g3 g6 5.Bg2 Nxc3
B17	Smyslov Variation, Caro-Kann	1.e4 c6 2.d4 d5 3.Nc3 dxe4 4.Nxe4 Nd7 5.Bc4 Ngf6 6.Ng5 e6 7.Qe2 Nb6
D29	Smyslov Variation, Classical Defense, QGA	1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.e3 e6 5.Bxc4 c5 6.O-O a6 7.Qe2 b5 8.Bb3 Bb7 9.Rd1 Nbd7 10.Nc3 Bd6
A21	Smyslov Variation, English	1.c4 e5 2.Nc3 d6 3.Nf3 Bg4
D80	Smyslov Variation, Grunfeld	1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.e3 Bg7 5.Nf3 O-O 6.Bd3 c6 7.O-O Bg4
D98	Smyslov Variation, Grunfeld; D98	1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.Qb3 dxc4 6.Qxc4 O-O 7.e4 Bg4
E61	Smyslov Variation, KID	1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.Bg5
E61	Smyslov Variation, KID	1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.Nf3 d6 5.Bg5
E48	Smyslov Variation, Nimzo-Indian	1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Bd3 d5 6.Nf3 c5 7.O-O dxc4 8.Bxc4 Qe7
E55	Smyslov Variation, Nimzo-Indian	1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Nf3 d5 6.Bd3 c5 7.O-O dxc4 8.Bxc4 Qe7
D25	Smyslov Variation, QGA	1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.e3 g6
C93	Smyslov Variation, Ruy Lopez; C93	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 d6 8.c3 O-O 9.h3 h6
D16	Smyslov Variation, Slav	1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 dxc4 5.a4 Na6
A05	Smyslov Variation, Zukertort	1.Nf3 Nf6 2.g3 g6 3.b4
B00	Snagkeouss Defense	1.e4 a5 2.d4 Nc6
A43	Snail Variation, Benoni	1.d4 c5 2.d5 Na6
A61	Snake Variation, Benoni	1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 Bd6
D00	Sneiders Attack, BDG	1.d4 d5 2.e4 dxe4 3.Nc3 e5 4.Qh5
B20	Snyder Variation, Sicilian	1.e4 c5 2.b3
C25	Soerensen Defense, Vienna	1.e4 e5 2.Nc3 Nc6 3.f4 exf4 4.d4 Qh4+ 5.Ke2 g5
C37	Soerensen Gambit, KGA	1.e4 e5 2.f4 exf4 3.Nf3 g5 4.d4 Bg4 5.Nc3
E97	Sokolov's Line, KID	1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 O-O 6.Be2 e5 7.O-O Nc6 8.d5 Ne7 9.b4 Nh5 10.Re1
E09	Sokolsky Variation, Catalan	1.d4 Nf6 2.c4 e6 3.g3 d5 4.Bg2 Be7 5.Nf3 O-O 6.O-O Nbd7 7.Qc2 c6 8.Nbd2 b6 8.Nbd2 b6 9.b3 a5 10.Bb2 Ba6
C52	Sokolsky Variation, Evans	1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.b4 Bxb4 5.c3 Ba5 6.d4 d6 7.Bg5
D89	Sokolsky Variation, Grunfeld	1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.cxd5 Nxd5 5.e4 Nxc3 6.bxc3 Bg7 7.Bc4 O-O 8.Ne2 c5 9.O-O Nc6 10.Be3 cxd4 11.cxd4 Bg4 12.f3 Na5 13.Bd3 Be6 14.d5
C41	Sokolsky Variation, Philidor	1.e4 e5 2.Nf3 d6 3.d4 Nf6 4.dxe5 Nxe4 5.Nbd2
D00	Soller Attack, BDG	1.d4 d5 2.e4 dxe4 3.Nc3 Bf5 4.f3 Nf6 5.Bc4
A40	Soller Gambit Deferred	1.d4 e5 2.dxe5 Nc6 3.Nf3 f6
D00	Soller; Lemberger Var, BDG; Diemer Attack	1.d4 d5 2.e4 dxe4 3.Nc3 e5 4.Be3
A40	Soller; Purchas Gambit	1.d4 e5 2.dxe5 f6
D00	Soller; Vienna Var, BDG	1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 Bf5 5.Bc4
C30	Soller-Zilbermints Gambit, KGD	1.e4 e5 2.f4 f6 3.fxe5 Nc6
D20	Somov Gambit, QGA	1.d4 d5 2.c4 dxc4 3.e4 e5 4.Bxc4
C21	Sorensen Defense, Center	1.e4 e5 2.d4 exd4 3.c3 d5
C37	Sorensen Gambit, KGA	1.e4 e5 2.f4 exf4 3.Nf3 g5 4.d4 Bg4 5.Ne5
A57	Sosonko Variation, Benko Gambit	1.d4 Nf6 2.c4 c5 3.d5 b5 4.a4
B77	Sosonko Variation, Sicilian Dragon	1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6 6.Be3 Bg7 7.f3 O-O 8.Qd2 Nc6 9.Bc4 Nd7
D16	Soultanbeieff Variation, Slav	1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 dxc4 5.a4 e6
C63	Soviet Youth Variation, Ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 f5 4.Nc3 Nd4 5.O-O
B20	Sozin Formation, Smith-Morra Accepted, Sicilian	1.e4 c5 2.d4 cxd4 3.c3 dxc3 4.Nxc3 Nc6 5.Nf3 e6 6.Bc4 d6 7.O-O a6 8.Qe2 b5
D49	Sozin Variation, QGD	1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.e3 Nbd7 6.Bd3 dxc4 7.Bxc4 b5 8.Bd3 a6 9.e4 c5 10.e5 cxd4 11.Nxb5 Nxe5
B57	Sozin; Velimirovic Attack, Sicilian; B57	1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Bc4
C92	Spanish Benoni, Ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 d6 8.c3 O-O 9.h3 Na5 10.Bc2 c5 11.d4 Qc7 12.d5
E73	Spanish Defense, KID	1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Be2 O-O 6.Bg5 a6
C48	Spanish Four Knights Game; C48	1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 4.Bb5
C44	Spanish Variation, Ponziani	1.e4 e5 2.Nf3 Nc6 3.c3 d5 4.Bb5
C64	Spanish Wing Gambit, Ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 Bc5 4.b4
A40	Spassky Gambit, Polish Defense	1.d4 b5 2.e4 Bb7 3.Bxb5
E14	Spassky System, QID; E14	1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.e3
E60	Spassky Variation	1.d4 Nf6 2.c4 g6 3.g3 Bg7 4.Bg2 d6 5.Nf3 O-O 6.Nc3 Nc6 7.O-O Bf5
D87	Spassky Variation, Grunfeld; D87	1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.cxd5 Nxd5 5.e4 Nxc3 6.bxc3 Bg7 7.Bc4 O-O 8.Ne2 c5
D34	Spassky Variation, Tarrasch	1.d4 d5 2.c4 e6 3.Nc3 c5 4.cxd5 exd5 5.Nf3 Nc6 6.g3 Nf6 7.Bg2 Be7 8.O-O O-O 9.Bg5 cxd4 10.Nxd4
A05	Spassky Variation, Zukertort	1.Nf3 Nf6 2.g3 b5
A04	Speelsmet Gambit, Zukertort	1.Nf3 c5 2.d4 cxd4 3.e3
D00	Sperling Attack, BDG	1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 Bf5 5.d5
C24	Spielmann Attack, Bishop	1.e4 e5 2.Bc4 Nf6 3.d3 Bc5 4.Nc3
A32	Spielmann Defense, Symmetrical English; A32	1.c4 c5 2.Nf3 Nf6 3.d4 cxd4 4.Nxd4 e6
A80	Spielmann Gambit, Dutch	1.d4 f5 2.Nc3 Nf6 3.g4
B02	Spielmann Variation, Alekhine	1.e4 Nf6 2.Nc3 d5 3.e5 Nfd7 4.e6
E10	Spielmann Variation, Blumenfeld	1.d4 Nf6 2.c4 e6 3.Nf3 c5 4.d5 b5 5.Bg5 exd5 6.cxd5 h6
C14	Spielmann Variation, French	1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bg5 Be7 5.e5 Nfd7 6.h4 O-O
E22	Spielmann Variation, Nimzo-Indian; E22	1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Qb3
B56	Spielmann Variation, Sicilian	1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Nde2
A46	Spielmann-Indian	1.d4 Nf6 2.Nf3 c5
A00	Spike Deferred	1.g4 g6 2.d3
A00	Spike Deferred; Myers Spike Attack	1.d3 g6 2.g4
A00	Spike Lee Gambit	1.h3 h5 2.g4
A01	Spike Variation, Larsen	1.b3 Nf6 2.Bb2 g6 3.g4
A00	Spike, Grob	1.g4 d5 2.Bg2 c6 3.g5
B00	St George; Birmingham; Baker	1.e4 a6
A40	St George's Gambit	1.d4 a6 2.c4 b5 3.e4 e6 4.cxb5 axb5
C82	St Petersburg Variation, Ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Nxe4 6.d4 b5 7.Bb3 d5 8.dxe5 Be6 9.c3 Bc5 10.Nbd2
A00	St. George Defense, Dunst	1.Nc3 a6
E43	St. Petersburg Variation, Nimzo-Indian; E43	1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 b6
C42	Stafford Gambit, Petroff	1.e4 e5 2.Nf3 Nf6 3.Nxe5 Nc6
E23	Stahlberg Variation, Nimzo-Indian	1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Qb3 c5 5.dxc5 Nc6 6.Nf3 Ne4 7.Bd2 Nxc5 8.Qc2 f5 9.g3
E23	Stahlberg Variation, Nimzo-Indian	1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Qb3 c5 5.dxc5 Nc6 6.Nf3 Ne4 7.Bd2 Nxd2 8.Nxd2 O-O 9.O-O-O
D49	Stahlberg Variation, QGD	1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.e3 Nbd7 6.Bd3 dxc4 7.Bxc4 b5 8.Bd3 a6 9.e4 c5 10.e5 cxd4 11.Nxb5 Nxe5 12.Nxe5 axb5
C27	Stanley Variation, Vienna; C27	1.e4 e5 2.Nc3 Nf6 3.Bc4
A43	Staunton Defense; Benoni C-G; A43	1.d4 c5
A82	Staunton Gambit Accepted, Dutch	1.d4 f5 2.e4 fxe4
A82	Staunton Gambit, Dutch; A82	1.d4 f5 2.e4
C32	Staunton Line, KGD; C32	1.e4 e5 2.f4 d5 3.exd5 e4
C42	Staunton Variation, Petroff	1.e4 e5 2.Nf3 Nf6 3.Nxe5 d6 4.Nf3 Nxe4 5.d4 d5 6.Bd3 Bd6 7.O-O O-O 8.c4 c6
B20	Staunton-Cochrane Variation, Sicilian	1.e4 c5 2.c4
B10	Stein Attack, Caro-Kann	1.e4 c6 2.d3 d5 3.Nd2 g6 4.g3 Bg7 5.Bg2 e5 6.Ngf3 Ne7 7.O-O O-O 8.b4
A16	Stein Attack, English	1.c4 Nf6 2.Nc3 d5 3.cxd5 Nxd5 4.Nf3 g6 5.Qa4+
E92	Stein Defense, KID	1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 O-O 6.Be2 e5 7.d5 a5
C23	Stein Gambit, Bishop	1.e4 e5 2.Bc4 Bc5 3.f4
A00	Steinbok Gambit, Kadas	1.h4 f5 2.e4 fxe4 3.d3
E81	Steiner Attack, KID	1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f3 O-O 6.Bg5
A00	Steiner Gambit, Dunst	1.Nc3 d5 2.e4 dxe4 3.Nxe4 e5 4.f4
B28	Steiner Line, Sicilian	1.e4 c5 2.Nf3 a6 3.c3 d6
B02	Steiner Variation, Alekhine	1.e4 Nf6 2.e5 Nd5 3.c4 Nb6 4.b3
A51	Steiner Variation, Budapest	1.d4 Nf6 2.c4 e5 3.dxe5 Ne4 4.Qc2
E38	Steiner Variation, Nimzo-Indian	1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Qc2 c5 5.dxc5 Bxc3+
E20	Steiner Variation, Nimzo-Indian; Romanishin Variation	1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.g3
C41	Steiner Variation, Philidor	1.e4 e5 2.Nf3 d6 3.d4 Nd7 4.Bc4 c6 5.O-O Be7 6.dxe5
C89	Steiner Variation, Ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 O-O 8.c3 d5 9.exd5 e4
D16	Steiner Variation, Slav	1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 dxc4 5.a4 Bg4
C00	Steinitz Attack, French	1.e4 e6 2.e5
D00	Steinitz Countergambit, Queen Pawn Game	1.d4 d5 2.Bf4 c5
C71	Steinitz Defense Deferred; Ruy Lopez; C71	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 d6
C62	Steinitz Defense, Ruy Lopez; C62	1.e4 e5 2.Nf3 Nc6 3.Bb5 d6
C46	Steinitz Defense, Three Knights	1.e4 e5 2.Nf3 Nc6 3.Nc3 g6
C25	Steinitz Gambit, Vienna	1.e4 e5 2.Nc3 Nc6 3.f4 exf4 4.d4
C14	Steinitz Variation, French	1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bg5 Be7 5.e5 Nfd7 6.Bxe7 Qxe7 7.f4
C11	Steinitz Variation, French	1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.e5
C43	Steinitz Variation, Petoff; C43	1.e4 e5 2.Nf3 Nf6 3.Nxe5 d6 4.d4
C44	Steinitz Variation, Ponziani	1.e4 e5 2.Nf3 Nc6 3.c3 d5 4.Qa4 f6
D26	Steinitz Variation, QGA	1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.e3 e6 5.Bxc4 c5 6.O-O cxd4
C45	Steinitz Variation, Scotch	1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Nxd4 Qh4 5.Nc3
C29	Steinitz Variation, Vienna	1.e4 e5 2.Nc3 Nf6 3.f4 d5 4.d3
C45	Steinitz; Pulling Variation, Scotch	1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Nxd4 Qh4
B20	Steinitz; Tartakower, Lasker-Dunne Variation, Sicilian	1.e4 c5 2.g3
D80	Stockholm Variation, Grunfeld	1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Bg5
A40	Stockhom Variation, Englund Gambit	1.d4 e5 2.dxe5 Nc6 3.Nf3 Qe7 4.Qd5
B22	Stoltz Attack, Sicilian	1.e4 c5 2.c3 Nf6 3.e5 Nd5 4.Nf3 Nc6 5.Bc4 Nb6 6.Bb3
D45	Stoltz Variation, Semi-Slav	1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.e3 Nbd7 6.Qc2
D00	Stonewall Attack	1.d4 d5 2.e3 Nf6 3.Bd3 c5 4.c3
D00	Stonewall Attack, Queen Pawn Game	1.d4 d5 2.e3 Nf6 3.Bd3
D44	Stonewall Defense, Semi-Slav	1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.e3 Ne4 6.Bd3 f5
A84	Stonewall Variation, Dutch	1.d4 f5 2.c4 e6 3.Nc3 Nf6 4.g3 c6 5.Bg2 d5 6.O-O Bd6
C51	Stone-Ware Defense, Evans Gambit	1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.b4 Bxb4 5.c3 Bd6
C40	Strautins Gambit, Latvian	1.e4 e5 2.Nf3 f5 3.Bc4 b5
D00	Studier Attack, BDG	1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 exf3 5.Nxf3 g6 6.Bc4 Bg7 7.O-O O-O 8.Qe1
D00	Studier-Rasa Gambit, BDG	1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.Be3
A45	Stummer Gambit	1.d4 Nf6 2.g4 Nxg4 3.e4 d6 4.Be2 Nf6 5.Nc3
A03	Sturm; Mujannah	1.f4 d5 2.c4
C43	Suchting Gambit, Petroff	1.e4 e5 2.Nf3 Nf6 3.d4 exd4 4.Bc4
D15	Suchting Variation, Slav	1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 Qb6
C90	Suetin Variation, Ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 d6 8.c3 O-O 9.a3
C90	Suetin Variation, Ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 O-O 8.c3 d6 9.a3
C59	Suhle Defense, Two Knights	1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.Ng5 d5 5.exd5 Na5 6.Bb5+ c6 7.dxc6 bxc6 8.Be2 h6
B06	Suttles Variation, Modern Defense	1.e4 g6 2.d4 Bg7 3.Nc3 d6 4.Nf3 c6
C01	Svenius Variation, French	1.e4 e6 2.d4 d5 3.exd5 exd5 4.Nc3 Nf6 5.Bg5
C21	Svenonius Defense, Center	1.e4 e5 2.d4 exd4 3.c3 Ne7
C49	Svenonius Variation, 4 Knights	1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 4.Bb5 Bb4 5.O-O O-O 6.d3 Bxc3 7.bxc3 d5
C10	Svenonius Variation, French	1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.exd5
C30	Svenonius Variation, KGD	1.e4 e5 2.f4 Bc5 3.Nf3 d6 4.Nc3 Nf6 5.Bc4 Nc6 6.d3 Bg4
B33	Sveshnikov Variation, Sicilian	1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e5 6.Ndb5 d6 7.Bg5 a6 8.Na3 b5 9.Bxf6 gxf6 10.Nd5 f5
B07	Sveshnikov-Jansa Attack, Pirc	1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.Be3 c6 5.h3
C18	Swiss (Retreat) Variation, French	1.e4 e6 2.d4 d5 3.Nc3 Bb4 4.e5 c5 5.a3 Ba5
B42	Swiss Cheese Variation, Sicilian	1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 a6 5.Bd3 g6
A02	Swiss Gambit, Bird	1.f4 f5 2.e4 fxe4 3.Nc3 Nf6 4.g4
C11	Swiss Variation, French	1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bd3
A46	Swiss; Wagner Gambit	1.d4 Nf6 2.Nf3 e6 3.Bg5 c5 4.e4
A30	Symmetrical Defense, English; A30	1.c4 c5
D14	Symmetrical Line, Slav; D14	1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.cxd5 cxd5 5.Nc3 Nc6 6.Bf4 Bf5
C49	Symmetrical Variation, 4 Knights	1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 4.Bb5 Bb4 5.O-O O-O 6.d3 d6
A01	Symmetrical Variation, Larsen	1.b3 b6
C43	Symmetrical Variation, Petroff	1.e4 e5 2.Nf3 Nf6 3.d4 d5
D02	Symmetrical Variation, QP	1.d4 d5 2.Nf3 Nf6
A36	Symmetrical Variation, Symmetrical English	1.c4 c5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7
D32	Symmetrical Variation, Tarrasch	1.d4 d5 2.c4 e6 3.Nc3 c5 4.e3 Nf6 5.Nf3 Nc6
D97	Szabo (Boleslavsky) Variation, Grunfeld	1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.Qb3 dxc4 6.Qxc4 O-O 7.e4 c6
E60	Szabo Variation	1.d4 Nf6 2.c4 g6 3.g3 Bg7 4.Bg2 d6 5.Nf3 O-O 6.Nc3 Nc6 7.O-O e5
B44	Szen Variation, Sicilian	1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nc6 5.Nb5
B20	Taimanov Formation, Smith-Morra Accepted, Sicilian	1.e4 c5 2.d4 cxd4 3.c3 dxc3 4.Nxc3 e6 5.Bc4 a6 6.Nf3 Ne7
E17	Taimanov Gambit, QID	1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3 Bb7 5.Bg2 Be7 6.O-O O-O 7.d5 exd5 8.Nd4
B28	Taimanov Line, O'Kelly Sicilian	1.e4 c5 2.Nf3 a6 3.d4 cxd4 4.Nxd4 e5
A67	Taimanov Variation, Benoni; A67	1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.e4 g6 7.f4 Bg7 8.Bb5
A25	Taimanov Variation, English	1.c4 e5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7
E40	Taimanov Variation, Nimzo-Indian	1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 Nc6
B46	Taimanov Variation, Sicilian	1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nc6 5.Nc3 a6 6.Be2 Nge7
B44	Taimanov; Bastrikov, Paulsen Variation, Sicilian; B44	1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nc6
C43	Tal Gambit, Petroff	1.e4 e5 2.Nf3 Nf6 3.d4 exd4 4.e5 Ne4 5.Bb5
B21	Tal Gambit, Sicilian	1.e4 c5 2.f4 d5 3.exd5 Nf6
B12	Tal Variation, Caro-Kann	1.e4 c6 2.d4 d5 3.e5 Bf5 4.h4
A60	Tal Variation, Modern Variation, Benoni; A60	1.d4 Nf6 2.c4 c5 3.d5 e6
B82	Tal Variation, Sicilian	1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e6 6.f4 Nc6 7.Be3 Be7 8.Qf3
A43	Tamarkin Countergambit, Benoni	1.d4 c5 2.Nf3 cxd4 3.b4 e5
B15	Tarrasch (Alekhine) Gambit, Caro	1.e4 c6 2.d4 d5 3.Nc3 dxe4 4.Nxe4 Nf6 5.Bd3
E06	Tarrasch Defense, Catalan	1.d4 Nf6 2.c4 e6 3.g3 d5 4.Bg2 c5 5.Nf3 Nc6
D32	Tarrasch Defense, QGD; D32	1.d4 d5 2.c4 e6 3.Nc3 c5
D32	Tarrasch Gambit, QGD	1.d4 d5 2.c4 e6 3.Nc3 c5 4.cxd5 exd5 5.dxc5 d4 6.Na4 b5
C66	Tarrasch Trap, Ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 Nf6 4.O-O d6 5.d4 Bd7 6.Nc3 Be7 7.Re1 O-O
C14	Tarrasch Variation, French	1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bg5 Be7 5.e5 Nfd7 6.Bxe7 Qxe7 7.Bd3
C03	Tarrasch Variation, French; C03	1.e4 e6 2.d4 d5 3.Nd2
C42	Tarrasch Variation, Petroff	1.e4 e5 2.Nf3 Nf6 3.Nxe5 d6 4.Nf3 Nxe4 5.d4 d5 6.Bd3 Bd6 7.O-O O-O 8.c4 Bg4
C80	Tarrasch; Open Variation, Ruy Lopez; C80	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Nxe4
C52	Tartakower Attack, Evans	1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.b4 Bxb4 5.c3 Ba5 6.d4 d6 7.Qb3
D08	Tartakower Defense, QGD	1.d4 d5 2.c4 e5 3.dxe5 d4 4.Nf3 c5
D06	Tartakower Gambit, QGD	1.d4 d5 2.c4 Nc6 3.Nc3 e5
C60	Tartakower Gambit, Ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 Nge7 4.d4 exd4 5.Nxd4 g6 6.Nc3 Bg7 7.Be3 O-O 8.Qd2 d5
B74	Tartakower Line, Sicilian Dragon	1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6 6.Be3 Bg7 7.Be2 Nc6 8.O-O O-O 9.Nb3 Be6 10.f4 Qc8
B15	Tartakower Variation, Caro	1.e4 c6 2.d4 d5 3.Nc3 dxe4 4.Nxe4 Nf6 5.Nxf6+ exf6
A82	Tartakower Variation, Dutch	1.d4 f5 2.e4 fxe4 3.Nc3 Nf6 4.g4
C12	Tartakower Variation, French	1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bg5 Bb4 5.e5 h6 6.Bd2 Nfd7
C14	Tartakower Variation, French	1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bg5 Be7 5.e5 Ne4
C50	Tartakower Variation, Hungarian	1.e4 e5 2.Nf3 Nc6 3.Bc4 Be7 4.d4 exd4 5.c3 Nf6 6.e4 Ne4
D58	Tartakower Variation, QGD; D58	1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 O-O 6.Nf3 h6 7.Bh4 b6
C80	Tartakower Variation, Ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Nxe4 6.Qe2
C63	Tartakower Variation, Ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 f5 4.Nc3 fxe4 5.Nxe4 Nf6
C45	Tartakower Variation, Scotch	1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Nxd4 Nf6 5.Nxc6 bxc6 6.Nd2
B53	Tartakower Variation, Sicilian	1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.c3
A53	Tartakower-Indian	1.d4 Nf6 2.c4 d6 3.Nf3 Bg4
C34	Tashkent Attack, KGA	1.e4 e5 2.f4 exf4 3.Nf3 Nf6 4.e5 Nh5 5.g4
A80	Tate Gambit, Dutch	1.d4 f5 2.g4 fxg4 3.e4 d5 4.Nc3
D00	Tautvaisis Defense, BDG	1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 exf3 5.Qxf3 Nc6
C44	Taylor Opening; Inverted Hungarian	1.e4 e5 2.Nf3 Nc6 3.Be2
D00	Teichmann Variation, BDG	1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 exf3 5.Nxf3 Bg4
C14	Teichmann Variation, French	1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bg5 Be7 5.e5 Nfd7 6.h4 f6
D56	Teichmann Variation, QGD	1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 O-O 6.Nf3 h6 7.Bh4 Ne4 8.Bxe7 Qxe7 9.Qc2
D00	Tejler Attack, BDG	1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 Bf5 5.Bf4
D00	Tejler Gambit, BDG	1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 exf3 5.Qxf3 Qxd4 6.Be3 Qg4 7.Qf2 Ne4 8.Nxe4 Qxe4 9.O-O-O Nc6 10.Bd3
A06	Tennison G; Lemberg G; Abonyi G	1.Nf3 d5 2.e4
C54	Therkatz-Herzog, Italian	1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.c3 Nf6 5.d4 exd4 6.cxd4 Bb4+ 7.Nc3 Nxe4 8.O-O Bxc3 9.d5 Bf6 10.Re1 Ne7
C39	Thorold Attack, KGA	1.e4 e5 2.f4 exf4 3.Nf3 g5 4.h4 g4 5.Ng5 h6 6.Nxf7 Kxf7 7.d4
C23	Thorold Gambit	1.e4 e5 2.Bc4 b5 3.Bxb5 f5
C46	Three Knights Opening; C46	1.e4 e5 2.Nf3 Nc6 3.Nc3
A27	Three Knights System, English; A27	1.c4 e5 2.Nc3 Nc6 3.Nf3
D90	Three Knights Variation, Grunfeld; D90	1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3
E21	Three Knights Variation, Nimzo-Indian; E21	1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Nf3
D37	Three Knights Variation, QGD; D37	1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3
D15	Three Knights Variation, Slav; D15	1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3
C28	Three Knights Variation, Vienna; C28	1.e4 e5 2.Nc3 Nf6 3.Bc4 Nc6
B00	Three Pawn Attack, St George	1.e4 a6 2.d4 e6 3.c4
B06	Three Pawns Attack	1.e4 g6 2.d4 Bg7 3.f4
A40	Thuring Gambit; Hartlaub-Charlick Gambit	1.d4 e5 2.dxe5 d6
B00	Tiers Counter-Gambit	1.e4 f5
E15	Timman's Line, QID	1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3 Ba6 5.Qb3
E18	Tiviakov Defense, QID	1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3 Bb7 5.Bg2 Be7 6.O-O O-O 7.Nc3 Na6
B17	Tiviakov-Fischer Attack, Caro-Kann	1.e4 c6 2.d4 d5 3.Nc3 dxe4 4.Nxe4 Nd7 5.Bc4 Ngf6 6.Nxf6+ Nxf6
D31	Tolush Variation, Semi-Slav	1.d4 d5 2.c4 e6 3.Nc3 c6 4.e4 dxe4 5.Nxe4 Bb4+ 6.Bd2 Qxd4 7.Bxb4 Qxe4+8.Be2 c5 9.Bxc5 Qxg2
B01	Tomalty Gambit, Center Counter	1.e4 d5 2.exd5 Nf6 3.d4 Nxd5 4.c4 Nf6 5.Nc3 c5
A47	Torre Attack	1.d4 Nf6 2.Nf3 b6 3.Bg5
A46	Torre Attack	1.d4 Nf6 2.Nf3 e6 3.Bg5
D03	Torre Attack, QP; D03	1.d4 d5 2.Nf3 Nf6 3.Bg5
C20	Tortoise Opening	1.e4 e5 2.Bd3
B23	Traditional Closed Sicilian	1.e4 c5 2.Nc3 Nc6
D26	Traditional System QGA; D26	1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.e3 e6
C38	Traditional Variation, KGA; C38	1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Bc4 Bg7
D30	Traditional Variation, QGD	1.d4 d5 2.c4 e6 3.Nf3 Nf6 4.Bg5
E17	Traditional Variation, QID; E17	1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3 Bb7 5.Bg2 Be7
C88	Trajkovic Variation, Ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 Bb7
A40	Transpositional Variation, Keres Defense	1.d4 e6 2.c4 Bb4+ 3.Nc3
C57	Traxler; Wilkes-Barre Var, 2 Knights	1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.Ng5 Bc5
C57	Trencianske-Teplice Gambit, Two Knights	1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.Ng5 Bc5 5.Bxf7+ Ke7 6.d4
C77	Treybel; Flohr; Exchange Var Deferred	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.Bxc6
B03	Trifunovic Variation, Alekhine	1.e4 Nf6 2.e5 Nd5 3.d4 d6 4.c4 Nb6 5.f4 Bf5
C43	Trifunovic Variation, Petroff	1.e4 e5 2.Nf3 Nf6 3.d4 Nxe4 4.Bd3 d5 5.Nxe5 Bd6 6.O-O O-O 7.c4 Bxe5
C67	Trifunovic Variation, Ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 Nf6 4.O-O Nxe4 5.d4 Be7 6.Qe2 d5
D14	Trifunovic Variation, Slav	1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.cxd5 cxd5 5.Nc3 Nc6 6.Bf4 Bf5 7.e3 e6 8.Qb3 Bb4
A21	Troger Variation, English	1.c4 e5 2.Nc3 d6 3.g3 Be6 4.Bg2 Nc6
A25	Troger Variation, English	1.c4 e5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Be6
A45	Trompowsky; Opocensky; Ruth Opening	1.d4 Nf6 2.Bg5
A00	Tubingen Gambit, Dunst	1.Nc3 Nf6 2.g4
C33	Tumbleweed; King's Own, KGA	1.e4 e5 2.f4 exf4 3.Kf2
C00	Two Knight Variation, French	1.e4 e6 2.Nc3 d5 3.Nf3
B06	Two Knight Variation, Modern Defense	1.e4 g6 2.d4 Bg7 3.Nc3 d6 4.Nf3
B11	Two Knights Attack, Caro Kann	1.e4 c6 2.Nc3 d5 3.Nf3
D15	Two Knights Attack, Slav	1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 dxc4
C55	Two Knights Defense; C55	1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6
A37	Two Knights Line, Symmetrical English; A37	1.c4 c5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.Nf3
B08	Two Knights System, Pirc	1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.Nf3 Bg7
D01	Two Knights System, Veresov	1.d4 d5 2.Nc3 Nf6 3.Bg5 Nbd7 4.Nf3
B10	Two Knights Variation, Caro	1.e4 c6 2.Nf3 d5 3.Nc3
A31	Two Knights Variation, English	1.c4 c5 2.Nf3 Nf6 3.d4 cxd4 4.Nxd4
A22	Two Knights Variation, English; A22	1.c4 e5 2.Nc3 Nf6
C00	Two Knights Variation, French	1.e4 e6 2.Nf3 d5 3.Nc3
A54	Two Knights Variation, Old Indian; A54	1.d4 Nf6 2.c4 d6 3.Nc3 e5 4.Nf3
A35	Two Knights Variation, Symmetrical English; A35	1.c4 c5 2.Nc3 Nc6
D32	Two Knights Variation, Tarrasch	1.d4 d5 2.c4 e6 3.Nc3 c5 4.cxd5 exd5 5.Nf3
A00	Twyble Attack, Dunst	1.Nc3 c5 2.Rb1
A45	Ueberlinger Gambit	1.d4 Nf6 2.g3 e5
A61	Uhlmann Variation, Benoni	1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.Nf3 g6 7.Bg5
D50	Uhlmann Variation, QGD	1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.Nf3 h6 6.Bh4 O-O 7.Rc1 dxc4
E62	Uhlmann-Szabo System, KID	1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.Nf3 d6 5.g3 O-O 6.Bg2 Nc6 7.O-O e5
E94	Ukranian Defense, KID	1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 O-O 6.Be2 e5 7.O-O a5
A53	Ukranian Variation	1.d4 Nf6 2.c4 d6 3.Nc3 e5
D79	Ultra-delayed Exchange Variation, Neo-Grunfeld	1.d4 Nf6 2.c4 g6 3.g3 d5 4.Bg2 Bg7 5.Nf3 O-O 6.O-O c6 7.cxd5 cxd5
C57	Ulvestad Variation, 2 Knights	1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.Ng5 d5 5.exd5 b5
C51	Ulvestad Variation, Evans	1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.b4 Bxb4 5.c3 Bc5 6.d4 exd4 7.O-O d6 8.cxd4 Bb6 9.d5 Na5 10.Bb2
B12	Ulysses Gambit, Caro	1.e4 c6 2.d4 d5 3.Nf3 dxe4 4.Ng5
B09	Unzicker Attack, Pirc	1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.f4 Bg7 5.Nf3 O-O 6.e5
C42	Urosov Gambit, Petroff	1.e4 e5 2.Nf3 Nf6 3.Bc4
C39	Urusov Attack, KGA	1.e4 e5 2.f4 exf4 3.Nf3 g5 4.h4 g4 5.Ng5 h6 6.Nxf7 Kxf7 7.Bc4+ d5 8.Bxd5+ Ke8 9.d4
C43	Urusov Gambit, Petroff	1.e4 e5 2.Nf3 Nf6 3.Nxe5 d6 4.d4 exd4 4.Bc4
C24	Urusov; Ouroussoff; Keidansky G	1.e4 e5 2.Bc4 Nf6 3.d4 exd4 4.Nf3
B12	Van der Wiel Attack, Caro-Kann	1.e4 c6 2.d4 d5 3.e5 Bf5 4.Nc3
A50	Van Geet; Kevitz; Trajkovic; Mexican	1.d4 Nf6 2.c4 Nc6
A00	Van Kruijk Gambit	1.g3 h5 2.Nf3 h4
A00	Van't Kruijs Opening	1.e3 e5
B00	Vehre Variation, Nimzovich Defense	1.e4 Nc6 2.d4 d5 3.Nc3 Nf6
B89	Velimirovic Variation, Sicilian	1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e6 6.Bc4 Nc6 7.Be3 Be7 8.Qe2
A00	Venezolana	1.d3 c5 2.Nc3 Nc6 3.g3
B55	Venice Attack, Sicilian	1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.f3 e5 6.Bb5+
B56	Venice Attack, Sicilian	1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e5 6.Bb5+
B28	Venice System, Sicilian	1.e4 c5 2.Nf3 a6 3.c3
D01	Veresov Variation, QP	1.d4 d5 2.Nc3 Nf6 3.Bg5 Bf5 4.Bxf6
D20	Versov; Betbeder; Schwartz Defense, QGA	1.d4 d5 2.c4 dxc4 3.e4 f5
C25	Vienna Gambit	1.e4 e5 2.Nc3 Nc6 3.f4
C29	Vienna Gambit, Vienna; C29	1.e4 e5 2.Nc3 Nf6 3.f4
C24	Vienna Hybrid, Bishop	1.e4 e5 2.Bc4 Nf6 3.d3 Nc6 4.Nc3
D00	Vienna Variation, BDG	1.d4 d5 2.e4 dxe4 3.Nc3 Nf6
D80	Vienna Variation, Grunfeld	1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.e3 Bg7 5.Nf3 O-O 6.Qb3
D30	Vienna Variation, QGD	1.d4 d5 2.c4 e6 3.Nf3 Nf6 4.Bg5 Bb4+
D39	Vienna Variation, QGD; D39	1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 Bb4 5.Bg5 dxc4
D44	Vienna Variation, Semi-Slav	1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 dxc4
C25	Vienna; Hamppe Opening; C25	1.e4 e5 2.Nc3
B23	Vinken System, Sicilian; Grand Prix Attack	1.e4 c5 2.Nc3 Nc6 3.f4
C60	Vinogradov Var, Ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 Qe7
C13	Vistaneckis (Nimzovich) Variation, French	1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bg5 Be7 5.e5 Ng8
B80	Vitolins Variation, Sicilian	1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e6 6.Bb5+
E33	Vitolinsh-Adorjan Gambit, Nimzo Indian	1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Qc2 O-O 5.a3 Bxc3+ 6.Qxc3 b5
C44	Vitzhum Attack, Scotch	1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Bc4 Bc5 5.Ng5 Nh6 6.Qh5
A45	Von Beivorseen	1.d4 Nf6 2.Nc3 c5 3.dxc5
C21	Von der Lasa Gambit	1.e4 e5 2.d4 exd4 3.Bc4
B15	Von Hennig Gambit, Caro	1.e4 c6 2.d4 d5 3.Nc3 dxe4 4.Bc4
D32	Von Hennig Gambit, QGD	1.d4 d5 2.c4 e6 3.Nc3 c5 4.cxd5 cxd4 5.Qxd4 Nc6 6.Qd1 exd5 7.Qxd5 Be6
D00	Von Popiel Gambit	1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.Bg5
A04	Vos Gambit, Zukertort	1.Nf3 d6 2.d4 e5
C44	Vukovic Gambit, Ponziani	1.e4 e5 2.Nf3 Nc6 3.c3 Nf6 4.d4 Nxe4 5.d5 Bc5
A56	Vulture Defense, Benoni	1.d4 c5 2.d5 Nf6 3.c4 Ne4
A56	Vulture Variation; Der Geier	1.d4 Nf6 2.c4 c5 3.d5 Ne4
A41	Wade Defense	1.d4 d6 2.Nf3 Bg4
A04	Wade Defense	1.Nf3 d6
A10	Wade Gambit, English	1.c4 f5 2.g4
C02	Wade Variation, French	1.e4 e6 2.d4 d5 3.e5 c5 4.c3 Qb6 5.Nf3 Bd7
D47	Wade Variation, QGD	1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.e3 Nbd7 6.Bd3 dxc4 7.Bxc4 b5 8.Bd3 Bb7
A04	Wade-Tartakower Defense, Zukertort	1.Nf3 d6 2.e4 Bg4
D33	Wagner Variation, Tarrasch	1.d4 d5 2.c4 e6 3.Nc3 c5 4.cxd5 exd5 5.Nf3 Nc6 6.g3 Nf6 7.Bg2 Bg4
A02	Wagner-Zwitersch Gambit, Bird	1.f4 f5 2.e4
C39	Walker (Urusov) Attack, KGA	1.e4 e5 2.f4 exf4 3.Nf3 g5 4.h4 g4 5.Ng5 h6 6.Nxf7 Kxf7 7.Bc4+
C23	Walker Variation, Bishop	1.e4 e5 2.Bc4 Bc5 3.c3 d5 4.Bxd5 Nf6 5.d4
C20	Walkerling	1.e4 e5 2.f3 Nf6
B03	Wall Variation, Alekhine	1.e4 Nf6 2.e5 Nd5 3.d4 c5
B20	Wall Variation, Sicilian	1.e4 c5 2.d4 Nf6 3.e5 Nd5
C52	Waller Attack, Evans	1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.b4 Bxb4 5.c3 Ba5 6.d4 exd4 7.O-O d6 8.Qb3
B00	Ware Defense	1.e4 a5
A00	Ware Gambit	1.a4 e5 2.a5 d5 3.e3 f5 4.a6
A00	Ware; Meadow Hay; Crab	1.a4
C24	Warsaw Gambit, Bishop	1.e4 e5 2.Bc4 Nf6 3.d4 exd4 4.c3
A88	Warsaw Variation, Dutch; A88	1.d4 f5 2.c4 Nf6 3.g3 g6 4.Bg2 Bg7 5.Nf3 O-O 6.O-O d6 7.Nc3 c6
A00	Warsteiner Gambit, Dunst	1.Nc3 d5 2.f4 g5
C40	Wasp Variation	1.e4 e5 2.Nf3 d5 3.Nxe5 dxe4 4.Bc4 Qg5
C20	Wayward Queen; Danvers; Parnham	1.e4 e5 2.Qh5
C20	Weber Gambit	1.e4 e5 2.d3 d5 3.exd5 c6 4.dxc6 Nxc6
A45	Webster Gambit	1.d4 Nf6 2.f3 c5 3.d5 e6 4.e4 exd5 5.e5
A56	Weenink Variation, Benoni	1.d4 Nf6 2.c4 c5 3.dxc5 e6
D00	Weinsbach Declination, BDG	1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 e6
C33	Weiss Defense, KGA	1.e4 e5 2.f4 exf4 3.Be2 f5 4.exf5 d6
B09	Weiss Variation, Pirc	1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.f4 Bg7 5.Nf3 O-O 6.Bd3
B02	Welling Variation, Alekhine	1.e4 Nf6 2.e5 Nd5 3.b3
D00	Welling Variation, Queen Pawn Game	1.d4 d5 2.Bg5 Bg4
C67	Westerinen Line, Ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 Nf6 4.O-O Nxe4 5.d4 Nd6 6.Bxc6 dxc6 7.dxe5 Ne4
B06	Westermann Gambit	1.e4 g6 2.d4 Bg7 3.Bd2
D51	Westphalian Variation, QGD	1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Nbd7 5.e3 Bb4 6.Nf3 c5
C20	Whale Opening	1.e4 e5 2.c4
B00	Wheeler Gambit, Nimzovich Defense	1.e4 Nc6 2.b4 Nxb4 3.c3 Nc6 4.d4
A00	Wiedenhagen-Beta Gambit	1.g3 d5 2.Nf3 g5
D17	Wiesbaden Variation, Slav	1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 dxc4 5.a4 Bf5 6.Ne5 e6
D00	Wiesengren Defense, BDG	1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 Bc5
A52	Wikstrom Gambit, Budapest	1.d4 Nf6 2.c4 e5 3.dxe5 Ng4 4.e4 Nxe5 5.f4 Nbc6
B00	Wild Bull Defense	1.e4 Nh6
C35	Wild Cunningham Gambit, KGA	1.e4 e5 2.f4 exf4 3.Nf3 Be7 4.Bc4 Bh4+
A03	Williams Gambit, Bird	1.f4 d5 2.e4 dxe4 3.Nc3
B00	Williams Variation, Nimzovich	1.e4 Nc6 2.Nf3 d6
A13	Wimpy System, English	1.c4 e6 2.Nf3 d5 3.b3 Nf6 4.Bb2 c5 e3
C67	Winawer Attack, Ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 Nf6 4.O-O Nxe4 5.d4 Be7 6.Qe2 Nd6 7.Bxc6+ bxc6 8.dxe5 Nb7 9.Nd4 O-O
D10	Winawer Counter Gambit, Slav	1.d4 d5 2.c4 c6 3.Nc3 e5
C46	Winawer Defense, Three Knights	1.e4 e5 2.Nf3 Nc6 3.Nc3 f5
C15	Winawer Variation, French; C15	1.e4 e6 2.d4 d5 3.Nc3 Bb4
C15	Winckelmann-Riemer Gambit, French	1.e4 e6 2.d4 d5 3.Nc3 Bb4 4.a3
B06	Wind Gambit	1.e4 g6 2.d4 Bg7 3.Bd3
B00	Wind Gambit, Owen Defense	1.e4 b6 2.d4 Bb7 3.f3 e5
C78	Wing Attack, Ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O b5 6.Bb3 Be7 7.a4
B20	Wing Formation, Smith-Morra Declined, Sicilian	1.e4 c5 2.d4 cxd4 3.c3 Qa5
B51	Wing Gambit Deferred, Sicilian	1.e4 c5 2.Nf3 d6 3.b4
B40	Wing Gambit Deferred, Sicilian	1.e4 c5 2.Nf3 e6 3.b4
B01	Wing Gambit, Center Counter	1.e4 d5 2.exd5 Nf6 3.d4 g6 4.c4 b5
C00	Wing Gambit, French	1.e4 e6 2.Nf3 d5 3.e5 c5 4.b4
B20	Wing Gambit, Sicilian	1.e4 c5 2.b4
B28	Wing Gambit, Sicilian	1.e4 c5 2.Nf3 a6 3.b4
A00	Wing Gambit, Ware Opening	1.a4 b5
A30	Wing Variation, English	1.c4 c5 2.b4
B20	Wing; Carlsbad Variation, Sicilian	1.e4 c5 2.b4 cxb4 3.a3 bxa3
A00	Winterberg Gambit	1.g3 d5 2.Bg2 e5 3.c4 dxc4 4.b3
C12	Wolf Gambit, French	1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bg5 Bb4 5.Nge2
A00	Wolferts Gambit, Polish	1.b4 e5 2.Bb2 c5
B00	Woodchuck Variation, St George	1.e4 a6 2.d4 Nc6
A43	Woozle Defense, Benoni	1.d4 c5 2.d5 Nf6 3.Nc3 Qa5
C77	Wormald Variation, Ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.Qe2
C86	Worrall Attack, Ruy Lopez; C86	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Qe2
A00	Wulumulu	1.h4 e5 2.d4
C29	Wurzburger Trap, Vienna	1.e4 e5 2.Nc3 Nf6 3.f4 d5 4.fxe5 Nxe4 5.d3 Qh4 6.g3 Nxg3 7.Nf3 Qh5 8.Nd5 Bxd5 9.Nf4
C58	Yankovich Variation, Two Knights	1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.Ng5 d5 5.exd5 Na5 6.d3 h6 7.Nf3 e4 8.Qe2 Nxc4 9.dxc4 Bc5 10.Nfd2
E83	Yates Defense, KID; E83	1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f3 O-O 6.Be3 Nc6
E16	Yates Variation, QID	1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3 Bb7 5.Bg2 Bb4+ 6.Bd2 a5
C91	Yates Variation, Ruy; C91	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 d6 8.c3 O-O 9.d4
B56	Yates Variation, Sicilian	1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Bd3
D20	Yefimov Gambit, QGA	1.d4 d5 2.c4 dxc4 3.e4 c5 4.d5 b5
E97	Yepishin's Line, KID	1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 O-O 6.Be2 e5 7.O-O Nc6 8.d5 Ne7 9.b4 Nh5 10.Qc2
B28	Yerevan System, O'Kelly Sicilian	1.e4 c5 2.Nf3 a6 3.Nc3
C37	Young Gambit, KGA	1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Bc4 g4 5.O-O gxf3 6.Qxf3 Qf6 7.Bxf7+ Kxf7 8.d4 Qxd4+ 9.Be3 Qf6
C37	Young Variation, KGA	1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Bc4 g4 5.Bxf7+ Kxf7 6.O-O gxf3 7.Qxf3 Qf6 8.d4 Qxd4+ 9.Be3
B76	Yugoslav Attack, Sicilian Dragon; B76	1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6 6.Be3 Bg7 7.f3 O-O
E60	Yugoslav Variation	1.d4 Nf6 2.c4 g6 3.g3 Bg7 4.Bg2 d6 5.Nf3 O-O 6.Nc3 c5
D99	Yugoslav Variation, Grunfeld	1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.Qb3 dxc4 6.Qxc4 O-O 7.e4 Bg4 8.Be3 Nfd7 9.Qb3 c5
E64	Yugoslav Variation, KID; E64	1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.Nf3 d6 5.g3 O-O 6.Bg2 c5
A46	Yusupov-Rubinstein System	1.d4 Nf6 2.Nf3 e6 3.e3
E08	Zagoriansky Variation, Catalan	1.d4 Nf6 2.c4 e6 3.g3 d5 4.Bg2 Be7 5.Nf3 O-O 6.O-O Nbd7 7.Qc2 c6 8.Rd1 b6 9.a4
B28	Zagorovsky Line, O'Kelly Sicilian	1.e4 c5 2.Nf3 a6 3.d4 cxd4 4.Qxd4
B91	Zagreb Variation, Sicilian; B91	1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.g3
A40	Zaire Defense	1.d4 Nc6 2.d5 Nb8 3.e4 Nf6 5.e5 Ng8
D80	Zaitsev Gambit, Grunfeld	1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.h4
A57	Zaitsev System, Benko Gambit	1.d4 Nf6 2.c4 c5 3.d5 b5 4.cxb5 a6 5.Nc3
C92	Zaitsev System, Ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 d6 8.c3 O-O 9.h3 Re8
A57	Zaitsev Variation, Benko Gambit	1.d4 Nf6 2.c4 c5 3.d5 b5 4.cxb5 a6 5.Nc3 axb5 6.e4 b4 7.Nb5 d6 8.Nf3 g6 9.Bc4
C64	Zaitsev Variation, Ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 Bc5 4.O-O Nd4 5.b4
B53	Zaitsev Variation, Sicilian	1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Qxd4 Nc6 5.Bb5 Qd7
D00	Zeller Defesne, BDG	1.d4 d5 2.e4 dxe4 3.Nc3 Bf5
D00	Zeller Defesne, BDG	1.d4 d5 2.e4 dxe4 3.Nc3 Bf5 4.f3 exf3 5.Qxf3 Bc8
C25	Zhuraviev Countergambit, Vienna	1.e4 e5 2.Nc3 Bb4 3.Qg4 Nf6
C25	Zhuravlev Counter-Gambit, Vienna	1.e4 e5 2.Nc3 Bb4 3.Qg4
D00	Ziegler; Gunderam's 2nd Defense, BDG	1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 exf3 5.Nxf3 c6
C30	Zilbermints Double Countergambit; KGD	1.e4 e5 2.f4 g5
C30	Zilbermints Double Gambit I, KGD	1.e4 e5 2.f4 Nc6 3.Nf3 g5
A40	Zilbermints Gambit	1.d4 e6 2.c4 e5
A40	Zilbermints Gambit II, Englund Gambit	1.d4 e5 2.dxe5 Nc6 3.Nf3 h6
D00	Zilbermints Gambit, BDG	1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 exf3 5.Nxf3 e6  6.Bg5 Be7 7.Bd3 Nc6 8.O-O Nxd4 9.Kh1
B00	Zilbermints Gambit, Borg	1.e4 g5 2.d4 e5
B00	Zilbermints Gambit, Carr Defense	1.e4 h6 2.d4 e5
B01	Zilbermints Gambit, Center Counter	1.e4 d5 2.b4
A10	Zilbermints Gambit, English	1.c4 g5 2.d4 e5
A40	Zilbermints Gambit, Englund Gambit	1.d4 e5 2.dxe5 Nc6 3.Nf3 Nge7
A00	Zilbermints Gambit, Grob	1.g4 d5 2.e4
A00	Zilbermints Gambit, Grob	1.g4 d5 2.e4 dxe4 3.Nc3
D06	Zilbermints Gambit, QGD	1.d4 d5 2.c4 b5
A09	Zilbermints Gambit, Reti	1.Nf3 d5 2.c4 b5
B00	Zilbermints Gambit, St George Defense	1.e4 a6 2.d4 e5
A43	Zilbermints Gambit; Nakamura Gambit, Benoni	1.d4 c5 2.b4 cxb4
D00	Zilbermints Variation, BDG	1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.Bg5 Bf5 5.Bxf6 exf6 6.g4 Bg6 7.Qe2 Bb4 8.Qb5+
D02	Zilbermints Variation, QP	1.d4 d5 2.Nf3 Nf6 3.c4 b5
A43	Zilbermints-Benoni Gambit	1.d4 c5 2.Nf3 cxd4 3.b4
E90	Zinnowitz Variation, KID	1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 O-O 6.Bg5
B73	Zollner Gambit, Sicilian	1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6 6.Be3 Bg7 7.Be2 Nc6 8.O-O O-O 9.f4 Qb6
D00	Zot	1.d4 d5 2.Bg5
C25	Zukertort Defense, Vienna	1.e4 e5 2.Nc3 Nc6 3.f4 exf4 4.d4 Qh4+ 5.Ke2 d5
C64	Zukertort Gambit, Ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 Bc5 4.O-O Nf6 5.c3
C41	Zukertort Variation, Philidor	1.e4 e5 2.Nf3 d6 3.d4 f5 4.Nc3
D05	Zukertort Variation, QP	1.d4 d5 2.Nf3 Nf6 3.e3 e6 4.Bd3
D02	Zukertort Variation, QP; D02	1.d4 d5 2.Nf3
C80	Zukertort Variation, Ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Nxe4 6.d4 b5 7.Bb3 d5 8.dxe5 Ne7
C67	Zukertort Variation, Ruy Lopez	1.e4 e5 2.Nf3 Nc6 3.Bb5 Nf6 4.O-O Nxe4 5.d4 Be7 6.Qe2 Nd6 7.Bxc6+ bxc6 8.dxe5 Nb7 9.c4
D00	Zurich Gambit	1.d4 d5 2.g4
A17	Zviagintsev-Krasenkov Attack, English	1.c4 Nf6 2.Nc3 e6 3.Nf3 Bb4 4.g4