Mate in 1 · No. 266 · Predicted ~600

Queen and rook

White to play and mate in one.

Position

White: king on d1, queen on g4, rook on g1, pawns on a4, b3 and c2
Black: king on f8, queen on c7, rook on e8, knight on d6, pawns on d5, e7, f7 and g7