Queens Gambit Declined Modern Variation Puzzle (Rated 1079): Win Material — Chess Endgame Fork

This chess endgame puzzle shows how a single active knight can turn a small material edge into a decisive advantage. Black’s pieces are coordinated around the white king and the loose rook, creating a classic fork-based tactic in a simplified position. The key idea is not brute force, but using activity, tempo, and a vulnerable king placement to win material. In classical chess, endgames often reward the side that spots tactical targets faster than the opponent can defend them.