Overloading — what it means in chess
Burdening one piece with too many defensive duties so one fails.
Burdening one piece with too many defensive duties so one fails.
A piece is overloaded when it defends two things at once and can only answer for one. The tactic is not aimed at the overloaded piece itself — it is aimed at one of its duties, in the certain knowledge that answering there abandons the other.
[[board startfen="2r3k1/3q1ppp/8/3n3Q/8/8/8/2R3K1 w - - 0 1" pgn="1. Rxc8+ Qxc8 2. Qxd5" caption="Overloading: the queen defends both c8 and d5, and answering one duty abandons the other." notes="White to move. The Black queen on d7 is the sole defender of two targets: the rook on c8 and the knight on d5. Rxc8+ — White cashes the first duty, with check. The queen must answer. Qxc8 — she recaptures, as she must — and in doing so she leaves d5 behind. Qxd5 — the second duty falls. A rook was traded for a rook, and the knight came free: the overloaded defender paid for both."]]
Overloading completes the guard-fighting trio with deflection and removing the defender. The diagnostic question is the same in every position: what is this piece defending — and is it more than one thing?
The Endgame Society glossary defines more than 240 chess terms — rules, notation, tactics, strategy, pawn structures, endgames, and openings — in language a beginner can act on rather than dictionary shorthand.