Mate in 1 · No. 139 · Predicted ~800

Queen, rook and bishop

White to play and mate in one.

Position

White: king on g1, queen on b7, rook on d1, bishop on d2, pawns on b2, b3, d3 and g4
Black: king on e8, queen on c2, rook on c8, knight on a5, pawns on c6, d5, d6, e7, f7, h5 and h6