Mate in 7 — Problem #2997245
🎯 Checkmate in 7 — your move
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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
▲５三桂成 △７一玉 ▲６二成桂 △８一玉 ▲７一金 △９二玉 ▲８三金打
Why this move works
The answer is ▲５三桂成 △７一玉 ▲６二成桂 △８一玉 ▲７一金 △９二玉 ▲８三金打. Promote the knight and push with the promoted knight, then corner the king with two golds. ▲５三桂成 and ▲６二成桂 drive the king to 8一, and after ▲７一金 △９二玉, ▲８三金打 mates — defended from afar by the gold on 7四.
The promoted knight steadily shepherds the king to the edge, and the finishing 8三 gold works because of the distant gold on 7四. Driving the king toward the edge, where flight squares are scarce, is the essence of the attack.