Mate in 1 · No. 264 · Predicted ~600

Queen and rook

White to play and mate in one.

Position

White
king on g2, queen on g5, rook on g1, pawns on d4, e2, f4 and h4
Black
king on g8, queen on g6, rooks on f8 and h8, pawns on b7 and h6