EntityQ6398188· pop 6· linked from 535 articleskey squareSign in to savea square on the chessboard such that if a player's king can occupy it, he can force some gain such as the promotion of a pawn or the capture of an opponent's pawnConnectionsZugzwangEntityonline chessEntitychessEntityInternational Standard Book NumberEntityBobby FischerEntitypawnEntityrookEntitykingEntityqueenEntityknightEntitybishopEntityFIDEEntitycastlingEntityGrandmasterEntitychess openingEntityChess OlympiadEntitycheckmateEntityDeep BlueEntitychess pieceEntitySicilian DefenceEntityCategoriesChess endgamesChess tacticsChess terminologyChess theory