"In the set play White can mate immediately after 1... e3 e 1... f3. In the thematical tries 1.b7? e c7? Black can defeat successfully by 1... e3 and 1... f3 becausWhite has lost the control over 'd3' respectively 'c3'. Then in the solution the black Rook leaves the thirdpin line and we get continuations with dualavoidance and a halfpin. This results in a reciprocal change of mate after the two pawnmoves. A good and original problem."

"Reciprocal change of mate in the real play of a threemover. Not a new idea but it remains a difficult performance. A weakness is that the ehite Queen starts from different squares. Velimirovic may call this a pseudo form of the theme. It is somewhat confusing that black Knight can move to more than two fields in order to defeat the threat."

"Le Grand-theme in the real play of treemover is also not easy to compose. Here again one can say it is a pseudo form as the white pieces do not start the same squares. The mechanism is same as that in the problm of K.Keller 3rd price The problemist 1986, W: Kd8,Qa1,Rd7,Bc2,Be7,Nf6,Ng2,Pc5,e3,e4,f5 (11); B: Kg5,Ra2,Rd1,Bb4,Na8,Pb6,c4,d4,e2,h5,h6 (11). 1.Bd6!

"Again Le Grand-theme in the real play of threemover. Themechanism used in this problem is the same as that of F.Chlubna, Europe Rochade 1987 W: Kg3,Qc3,Bd7,Bh6,Pa6,d5 (6);
B: Ke4,Bh7,Pe5,f6,f7,g5 (6). 1.Bf8!.
Labai uses much more pieces. The only reason that I want to distinguis this problem is that the key gives the thematical flight e6."

"After a Grimshaw on 'g6' we see two Novotny's on 'd4' with changed mates. There exist several problems with this contents. For instanace there is a problem from 1992 by the same composer. But the place of the Grimshaw with respect to that of the Novotny and the black King is different."