Queens Pawn Game London System Hanging Piece Beginner Puzzle (Rated 1302): Win Material — Defensive Move

This middlegame puzzle comes from a Queen's Pawn Game London System structure where king safety outweighs raw material. White’s attacking pieces are active, but Black has a concrete tactical resource based on the exposed king and loose pieces around the kingside. The key idea is to meet the threat with a forcing defensive move that also turns the tables tactically. In classical chess, such positions often reward accurate calculation over general principles.