White to play and mate in one.
Your opponent moves…
The answer
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31. Nxf7#
Corner mate. Black moves the rook to g8 and attacks the queen. But the knight takes the pawn on f7 with check. The king in the corner can't move: the queen on g5 covers g7, and Black's own rook and pawn stand on g8 and h7. No black piece can take the knight, and a knight's check can't be blocked.
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The puzzle comes from Lichess. The position is from a real game.
Updated November 8, 2026