Defensive Exercises From Karpov Games Puzzle: Defend — Rook Trade

This chess endgame tests whether you can respond to a hanging piece without rushing into an exchange. Black's knight on b5 is attacked and currently lacks protection, so the position demands an active defensive idea. The best approach uses rook activity to challenge the opponent's coordination and make the threatened capture less damaging. In endgames, a defensive move can do more than save material. It can force a trade, improve your rook's position, and keep the balance intact.