Chess defense refers to strategies and techniques used by a player to protect their pieces and maintain a strong position against an opponent's attacks. Effective defense is crucial in chess, as it helps prevent the loss of material and keeps the player's position stable. Common defensive strategies include blocking threats, counterattacking, and developing pieces to create a solid formation. Players often aim to control key squares and maintain pawn structure to limit their opponent's options. A well-executed defense can turn the tide of the game, allowing for opportunities to launch a counteroffensive.