A clever miniature from a distinguished partnership who have enjoyed
great success with their joint compositions. Remember that in a helpmate
the move order is BWBWBWBW.
1.Bd8 Se7 2.Kxh5 Kf6 3.Bxe7+ Kf5 4.Bh4 g4.
Bishop and knight co-operate to help the white king reach f5, then the bishop returns to h4. Not an easy mate
to visualise, and the sacrifice of the knight is unexpected.