and Romeo also
Julia, i am ont an American i am from France !
Nikola, if you do not specify that the solution is in exactly 11.5 moves, then any shorter solution is a…
In both examples (P1091679, P1339295) the word "genau" could have been omitted, imho. It is clear that in both problems…
PDB uses the word "genau" extensively. The search stip="genau" and k="unique proof game" returns 27 problems, including twins that differ…
I don't understand the logic, if there is one at all. 11.5 is AS EXACT a number as it could…
Good choice, Nicolas. Although there are exceptions to this rule, it is a well established convention that a PG is…
Is is true that, in the modern approach, PG is often used to denote in fact SPG, and exact PG…
Joost, the stipulation "Shortest Proof Game" does not need to specify the side to move, or the number of moves…
That is the point Georgy. For threefold repetition of position to be claimed by players the side to move is…