Mate in 3 · No. 21 · Harder

Queen, two rooks and knight

White to play and mate in three.

Position

White
king on f2, queen on d2, rooks on e6 and g7, knight on b2, pawns on b3, d4, f3 and g3
Black
king on f8, rook on f5, knight on a2, pawns on f7 and h6