155. the general walks in, 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 3 legal first moves and exactly one of them works. 5 pieces, Black 2 to Red 13 in material, mate by the horse. Themes: the general walks in, Black never checks or captures.…