U-CHESS

U-Chess (Unambiguous Three Symbol Chess). In this variant we use the descriptive notation, common in the Latin countries and in the Anglo-Saxon countries until to epoches relatively recent.

In this variant could be play only moved not ambiguous, that is that they don't have necessity of subsequent qualifications beyond to the three symbols base above indicated.

In the start position could not be played to example N3B (Knight in third of Bishop) because is impossible know if Nf3 or Nc3, if a subsequent symbol is not added for identify the column. In the start position we can play only P4D (Pawn in fourth of Queen) or P4R (Pawn in fourth of King).

The play has been conceived from Mannis Charosh and Irving Chernev in the 1953. The first AISE championship was in Grand Prix 1991.

RULES

1. A movement is legal only if it could be write without ambiguity in descriptive notation with a maximum of three symbols. For example:
P3B= Pawn in third of Bishop
Q4K= Queen in fourth of Knigth
N3R= Knight in third of Rook
or, in case of capture:
PxP= Pawn takes Pawn
PxN= Pawn takes Knight
KxQ= King takes Queen

2. The sign of check and mate not are expressive for the calculation.
3. The promotion of a pawn with capture is illegal because it requires too much symbols (ex. PxN=Q).
4. A pawn in seventh gives check to the King adversary in octave commonly.
5. PxP (also en passant) is legal if it is the only possible capture on the board among two pawns.
6. Castle is legal in as express with three symbols or minus: 0-0 or 0-0-0.
7. A move is ambiguous (and then illegal) also if an of the two alternatives gives check (v. rule n°3).
8. An ambiguous move could not be played also if an of the two alternatives is illegal for other motives (for ex. it puts in check the own King).

Short game possible whit stalemate is: 1.P4R R4R 2.P4D P4D 3.C2R C2R 4.C2D C2D Stalemate because there isn't more movements not ambiguous.

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ETEROCHESS page

since 2 Apr. 1998; Last Updated: 2 Apr..1998