Mate in 3 · No. 304 · ~1700 · Sacrifice

Queen, two rooks and knight

White to play and mate in three.

Position

White
king on a2, queen on b1, rooks on a1 and c5, knight on h4, pawns on a3, a4, d3 and g2
Black
king on a6, queen on a7, rooks on b8 and c3, knights on d7 and d8, pawns on b4, b7, c4, c7, d4 and d6