Mate in 3 · No. 309 · Harder

Queen, rook and bishop

White to play and mate in three.

Position

White
king on f4, queen on h5, rook on g1, bishop on f8, pawns on a4, c2, d2, g4 and h4
Black
king on f6, rook on c5, pawns on c3, e3 and g3