Mate in 1 · No. 268 · Predicted ~600

Queen and rook

White to play and mate in one.

Position

White
king on g1, queen on c3, rook on c2, pawns on a4, d3, d4 and g2
Black
king on c8, queen on g8, rook on e7, pawns on a5, b6, c7, d7 and e6