Mate in 1 · No. 274 · Predicted ~600

Queen and rook

White to play and mate in one.

Position

White: king on g1, queen on e3, rook on e1, pawns on a3, b3, b4, c4 and d4
Black: king on e8, queen on a8, rooks on d8 and f8, pawns on a6, e6, g5 and h6