Mate in 3 · No. 482 · Harder

Queen, rook, bishop and knight

White to play and mate in three.

Position

White
king on g1, queen on d4, rook on a8, bishop on b3, knight on h5, pawns on c3 and g4
Black
king on g5, rook on a3, bishop on f3, pawns on d7 and g6