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S

sac

Often used as abbreviation for sacrifice.

Scandinavian defense

The Scandinavian defense, also called center counter defense, is characterized by the moves 1. e4 d5. It is classified as B01 in the Encyclopaedia of Chess Openings (ECO). The Scandinavian is one of the oldest recorded defenses dating back to a game played between Francesco di Castellvi and Narciso Vinyoles in Valencia in 1475.

skewer

Tactics based on an attack on a valuable piece that is forced to move away to avoid capture, exposing a less valuable piece to the attack.

stalemate

A game ends with stalemate if there are no legal moves available for the side that has to move and the king is not in check. The game is then finished and counted as draw. See also the entry for stalemate at Wikipedia.

RD Glossary by Run Digital