Mate in 1 · No. 123 · Predicted ~1200

Queen and rook

White to play and mate in one.

Position

White: king on g1, queen on c7, rook on b1, pawns on b4, c2, c4, d3, d4 and f3
Black: king on a8, queen on e7, rook on h8, bishop on d8, pawns on a7, b6 and h7