149. a piece already in the way, by the soldier

Helpmates in xiangqi

4 moves

Black moves first and both sides cooperate: Black, Red, Black, Red, and Red's second move mates. Black has 26 legal first moves and exactly one of them works. 23 pieces, Black 51 to Red 14 in material, mate by the soldier. Themes: a piece already in the way, the general walks in,…