Seems without the fairy condition also the solution will as it is helpmate.
"Black must absolutely check" would be a better translation of BlackUltraSchachZwang. "Black must check" already exists with a different meaning,…
Clearly the bK has to be on h1, to force the order of the moves 1.g8=nR 2.nRg2 3.a8=nQ. However after…
Right Geoff. It need not be a check. Wonder if it is sound with bKa3.
Does White's final move have to be a check? Even with the bK on a different square (e.g. bK on…
I would have preferred the solutions to be written in the format below (a ser-hs#3 is a 3-move help-series followed…
Breton and its variants are now available in Jacobi v0.7.2, which should help those who are composing proof games. You…
A berolina pawn on b3 would be better to get matching FML effect on B2/W3, but is of course a…
Good avoidance of Q promotions, and clever choice of which wR.
Of course this is a Zilahi (of the fully cyclic active 2-captures type): it is always the last of the…