Mate in 3 · No. 249 · Harder

Queen, rook, bishop and knight

White to play and mate in three.

Position

White
king on a5, queen on c4, rook on b5, bishop on h2, knight on c7, pawns on b3, d4 and g2
Black
king on h7, rook on g5, pawns on e4, e7, f4 and f7