Mate in 3 · No. 437 · Harder

Queen, bishop and knight

White to play and mate in three.

Position

White
king on g8, queen on g3, bishop on e8, knight on a1, pawns on d4, f3 and g4
Black
king on g5, rook on a8, bishop on h4, knight on b7, pawns on e6, g6, g7 and h3