Queen Sac Puzzle (Rated 742): Sacrifice — Mate in 3

This middlegame puzzle is a classic example of a sacrificial attack that opens lines to the king. Black’s heavy pieces are already active around the white king, and the key idea is to remove a defender while forcing the king into a tighter net. The position rewards accurate calculation over material count: once the first sacrifice lands, the remaining checks become forcing and the mating pattern is unavoidable.