10-13


The theme is HG gives checkmate or stalemate, selfmate, helpmate, doublestalemate, helpselfmate, semireflexmate etc. -- or simply plays a move, as in a proof game, A-to-B-chess, a retro, a study, a chessmathematical composition... …with the ONLY condition being that HG must be prominent in the solution.

Solution: 1.HxG6! (thr. 2.Rh5#) HxG6 2.HxG3 (thr. 3.e4+ Kg5 4.Rxg6#) HxG3 3.Rxg6 (thr. 4.Rg4 ad lib 5.e4#) Bd4 4.Kxd4 g2 5.Sg7#