Mate in 9 — Problem #3996313
🎯 Checkmate in 9 — 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
▲３一龍寄 △５二玉 ▲４二龍寄 △６一玉 ▲５一龍寄 △７二玉 ▲６二龍引 △８一玉 ▲７一金
Why this move works
The answer is ▲３一龍寄 △５二玉 ▲４二龍寄 △６一玉 ▲５一龍寄 △７二玉 ▲６二龍引 △８一玉 ▲７一金. With a single dragon you keep checking, driving the king one file at a time to the edge, then mate with a gold — a nine-move tsume.
The dragon clings to the king step by step, never granting a flight square; once the king reaches 8一, ▲７一金 mates, defended by the dragon on 6二 so the king cannot capture. A fine example of a relentless one-piece dragon hunt.