Mate in 3 · No. 107 · Harder

Queen, rook, bishop and knight

White to play and mate in three.

Position

White
king on b3, queen on f7, rook on e2, bishop on e4, knight on f1, pawns on b4, c4, e3, f2 and f4
Black
king on h4, queen on h8, rook on d4, knight on e7, pawns on e6 and f6