IMO, SPG 11.5 asks for the shortest proofgame with black to move, and since there's no proofgame in less moves…
Thierry Le Gleuher told me that as the retros editor of Phénix he would consider a PG 11.5 cooked if…
Although the main idea of this problem is to lose a tempo for a PG 11.5, any shorter solution, whether…
A nice idea. Promotion must be to queen, because a knight cannot lose a tempo.
PG 11.5 cannot be cooked in 11 moves because the side to move will be different. Shorter solution (cook) can…
Georgy, as you know, a shorter solution is a cook. To avoid a stipulation type "PG in exactly 11.5 moves",…
Jacobi found an alternative in 11 moves: 1.b3 Sc6 2.Ba3 Sd4 3.Bd6 exd6 4.f4 d5 5.f5 Bd6 6.f6 Se7 7.fxe7…
Sorry strict five is different
Is it not same as Strict Circe?
Please ignore my earlier comment. The position is legal and moving bPg5 to f5 leads to cooks!