Mate in 3 · No. 272 · Harder

Queen, rook, bishop and knight

White to play and mate in three.

Position

White
king on a2, queen on e5, rook on e4, bishop on d5, knight on a5, pawns on b3, d2, e3, h2 and h4
Black
king on h6, rook on g5, bishop on f8, knight on g8, pawns on f5, h5 and h7