Mate in 3 · No. 172 · Harder

Queen, rook, bishop and knight

White to play and mate in three.

Position

White
king on f3, queen on g5, rook on h5, bishop on c3, knight on e3, pawns on a2, d3, g4 and h2
Black
king on a4, rooks on d8 and e5, pawns on b5 and b7