Defensive sacrifice

A defensive sacrifice deliberately gives up material, meaning pawns or pieces with value, to reduce a greater danger. Rather than seeking an immediate attack, it aims to survive, equalize, force a draw, or reach a position the opponent can no longer convert easily.

What it can achieve

• Remove an attacking piece that cannot otherwise be driven away.
• Close a file or diagonal leading to an exposed king.
• Force a queen exchange and reduce mating threats.
• Gain a critical move for reorganizing the defense.
• Build a fortress, a position in which the opponent's material advantage has no effective way to make progress.
• Give a piece for dangerous pawns or for the last unit sustaining the attack.

The compensation may be entirely defensive. The player need not obtain an attack or recover the material immediately. It is enough for the resulting position to offer better practical chances than the line without the sacrifice. The idea must therefore be compared with the concrete threat, not with an abstract rule about preserving material.

It differs from a counter-sacrifice because it need not answer an opponent's sacrifice. It may be the best defensive move even when the attacker has given up nothing. The defining feature is the material concession's neutralizing or saving purpose.