Mate in 3 · No. 51 · Harder

Queen, two rooks and bishop

White to play and mate in three.

Position

White
king on b6, queen on d5, rooks on f2 and g4, bishop on d1, pawns on a2 and f4
Black
king on c8, queen on f7, rook on c1, pawns on a6 and b5