26. the cannon fires over a black piece, by the cannon

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. 16 pieces, Black 49 to Red 4.5 in material, mate by the cannon. Themes: the cannon fires over a black piece, Black blocks…