Mate in 3 · No. 164 · Harder

Queen, rook, bishop and knight

White to play and mate in three.

Position

White
king on a8, queen on b2, rook on g5, bishop on a6, knight on b8, pawns on g3, h2, h3 and h4
Black
king on h8, rook on h7, pawns on e7, f6, g7 and h6