79. discovered mate, by the horse

Helpmates in xiangqi

4 moves

Black moves first and both sides cooperate: Black, Red, Black, Red, and Red's second move mates. Black has 46 legal first moves and exactly one of them works. 16 pieces, Black 45 to Red 8.5 in material, mate by the horse. Themes: discovered mate, the general walks in, a quiet fir…