Mate in 1 — Problem #9
Black to move — find the mate
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9
8
7
6
5
4
3
2
1
一
二
三
四
五
六
七
八
九
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Show solution
▲５二金打
Why this move works
The answer is ▲５二金打 — a second gold dropped from hand (the “打” mark means a piece placed from hand), supported by the gold already on 4三.
This head gold covers every escape square (4一, 6一, 4二, 6二) and is protected by the gold behind it, so it cannot be captured. Two golds working together force mate.