Mate in 1 · No. 260 · Predicted ~1100

Queen and rook

White to play and mate in one.

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Position

White: king on g1, queen on a7, rook on d1, pawns on c4, e2 and f3
Black: king on g8, queen on h7, rook on h8, pawns on c5, f6, g5, g7 and h6