108. a piece already in the way, by the chariot

Helpmates in xiangqi

4 moves

Black moves first and both sides cooperate: Black, Red, Black, Red, and Red's second move mates. Black has 42 legal first moves and exactly one of them works. 18 pieces, Black 53 to Red 9 in material, mate by the chariot. Themes: a piece already in the way, the general walks in,…