Mate in 3 · No. 528 · Harder

Queen, bishop and two knights

White to play and mate in three.

Position

White
king on d1, queen on g3, bishop on b2, knights on c2 and c3, pawns on e2, f4 and h3
Black
king on f6, bishop on b6, knight on a7, pawns on c6 and e6