101. 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 47 legal first moves and exactly one of them works. 18 pieces, Black 49 to Red 10.5 in material, mate by the horse. Themes: discovered mate, a piece already in the way, the…