Ju Wenjun (Black) Puzzle: Mate — Capture Defender

Capturing the defender is a forcing tactical method: remove the one piece holding together an opponent’s king shelter or escape squares, then use checks to keep the king exposed. Here, Black’s active queen, rook, and knight coordinate against a centralized white king. Although White has a large material lead, king safety outweighs material when every reply is forced. The initial sacrifice eliminates a key defender and opens the way for a compact mating net.