Win 4: thirty checks (Red)

Crazyhouse Xiangqi: six engine games

91 moves

Thirty checks in 91 plies, 23 of them Red’s and 17 of those in its last 24 moves. The chariots trade early and come straight back from hand. Red’s advisors take two chariots between them. Black’s last word is three checking drops in a row, which Red’s general and advisor simply t…

f10-f1+: the chariots trade with check, and both go into hand.

R@g10+: the chariot comes straight back, onto Black’s back rank.

e3-f2: an advisor takes a chariot.

P@e8+: a soldier dropped into the palace with check. The general takes it.

e3-f4: another advisor takes another chariot.

C@c1+, P@d1+, P@e1+: Black’s last three drops all give check, and none of them works.

f10-e10: the soldier that took a horse on f10 steps sideways. Mate.