Mate in 3 · No. 429 · Harder

Queen, two bishops and knight

White to play and mate in three.

Position

White
king on b4, queen on d6, bishops on g4 and g7, knight on c1, pawns on b3, d4, e3, f3 and g3
Black
king on a8, bishop on e4, pawns on b6 and b7