Mate in 3 · No. 453 · Harder

Queen, rook and two bishops

White to play and mate in three.

Position

White
king on f7, queen on f5, rook on f2, bishops on a4 and g2, pawns on h2 and h3
Black
king on d6, queen on b1, rook on a6, bishop on d1, pawns on b4, e3, g3 and g5