Mate in 3 · No. 309 · ~2000 · Check

Queen, rook, bishop and knight

White to play and mate in three.

Position

White
king on e1, queen on a2, rook on f4, bishop on a3, knight on h4, pawns on b4, c4, g2 and h2
Black
king on a4, queen on c2, rook on a6, bishop on b5, knight on a5, pawns on d3, d4, d6 and d7