Mate in 3 · No. 390 · ~2000 · Check

Queen, rook, bishop and knight

White to play and mate in three.

Position

White
king on f4, queen on f6, rook on d1, bishop on a1, knight on a3, pawns on a4, b3, c4 and h4
Black
king on b4, queen on d5, rook on c6, bishops on e2 and e7, knight on b1, pawns on a5, a7, b7 and c5