Mate in 3 · No. 52 · Harder

Queen, rook, bishop and knight

White to play and mate in three.

Position

White
king on g8, queen on e7, rook on a3, bishop on c2, knight on f2, pawns on b3 and g3
Black
king on c8, rooks on a1 and b8, pawns on c7 and f7