Mate in 3 · No. 298 · Harder

Queen, rook, bishop and knight

White to play and mate in three.

Position

White
king on f4, queen on f3, rook on h2, bishop on h8, knight on a8, pawns on b3, b4, e3, g4 and h3
Black
king on d3, rooks on c8 and g2, knight on a2, pawns on a3 and c3