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Definitions of checkmate:

noun:   a chess move constituting an inescapable and indefensible attack on the opponent's king
noun:   complete victory
verb:   place an opponent's king under an attack from which it cannot escape and thus ending the game
Example: "Kasparov checkmated his opponent after only a few moves"

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Alternative Terms
shah baffle balk check defeat foil frustrate stymie thwart cross stump allow-prevent algebraic-chess-notation chess board-game chaturanga king resignation stalemate draw rules-of-chess hobson-jobson persian-language etymology fenny-stratford-railway-station fool-s-mate queen rook bishop-chess knight-chess list-of-chess-terms promotion-chess bishop-and-knight-checkmate opposition-chess tempo-game endgame-tablebase fork-chess fifty-move-rule two-knights-endgame underpromotion scholar-s-mate smothered-mate back-rank-checkmate boden-s-mate epaulette-mate l-gal-trap benoni-defense alex-yermolinsky emory-tate blackburne-shilling-gambit budapest-defence caro-kann-defence alexander-alekhine simultaneous-exhibition richard-r-ti savielly-tartakower dutch-defence englund-gambit bird-s-opening gr-nfeld-defence marshall-defense nimzowitsch-defence gedeon-barcza owen-s-defense gioachino-greco philidor-defence richter-veresov-attack modern-defense ruy-lopez bruce-pandolfini scandinavian-defense esteban-canal peruvian-immortal sicilian-defence siberian-trap wolfgang-unzicker mikhail-tal three-knights-opening vienna-game endgame model-mate pure-mate john-emms-chess-player reuben-fine pal-benko karsten-m-ller frank-lamprecht yasser-seirawan jon-speelman jonathan-tisdall robert-wade-chess-player chm mate arthur-bliss herrn-walsers-raben sheridan-le-fanu pamela-may june-brae casemate hal-turner

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