Mate in 3 · No. 527 · Harder

Queen and rook

White to play and mate in three.

Position

White
king on e8, queen on g4, rook on d8, pawns on c2, c4, d2, e3 and f2
Black
king on e5, rooks on d3 and f6, bishop on b1, pawns on b6, c3 and f5