90. Black blocks its own general, 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 30 legal first moves and exactly one of them works. 9 pieces, Black 19 to Red 11 in material, mate by the chariot. Themes: Black blocks its own general, a quiet first move b…