Overloading

Overloading occurs when one piece or pawn carries too many defensive responsibilities. It may be protecting two pieces, a piece and a square from which the king would be attacked with no legal reply, or a line and an entry point. Everything appears defended, but that safety is deceptive: if the defender leaves one duty to handle another, something becomes unprotected.

The attacker exploits this conflict by creating a threat that forces the defender to choose. Sometimes one target is captured; in other cases, a piece is offered to cause a deflection, meaning that the defender is forced away from its main duty. The sequence works only if the opponent has no other immediate move that solves both threats.

Overloading resembles a double attack, but the central idea is different. A double attack creates two simultaneous threats. Overloading focuses on one defending piece that was already holding two obligations and cannot preserve both.