Mate in 3 · No. 455 · Harder

Queen, rook, bishop and knight

White to play and mate in three.

Position

White
king on c3, queen on h2, rook on b7, bishop on a2, knight on d5, pawns on b4, e2, g4 and h3
Black
king on a8, queen on g8, pawns on a7 and c5