White to play and mate in two.
Your opponent moves…
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26. Nf6+ Kg7 27. Qh7#
Discovered check. The knight jumps from h5 to f6, and that opens the h-file for the queen: a discovered check. Black's only move is the king to g7. Then the queen goes to h7 with mate, protected by the knight. The knight on f6 is protected in turn by the pawn on e5, Black's own rook stands on f8, and f7 is on the same rank as the queen.
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The puzzle comes from Lichess. The position is from a real game.
Updated November 8, 2026