kill by squeezing the throat of so as to cut off the air; "he tried to strangle his opponent"; "A man in Boston has been strangling several dozen prostitutes"
a chess move constituting an inescapable and indefensible attack on the opponent's king
complete victory
place an opponent's king under an attack from which it cannot escape and thus ending the game; "Kasparov checkmated his opponent after only a few moves"