The conclusive victory in a game of chess that occurs when an opponent's king has no possible move that can remove him from check, the threat of attack
From applicable 2 x 4 Columns First Two (#1 and #2) Circulate 4 spots & 1/4 In as Last Two (#3 and #4) Circulate twice, 1/4 In, & Circulate Normal Columns end in Parallel Two-Faced Lines
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"
To check (an adversary's king) in such a manner that escape in impossible; to defeat (an adversary) by putting his king in check from which there is no escape
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
If one player's King (or Crown Prince, but note that if (s)he has both pieces on the board, then (s)he cannot be checkmated) is in danger of being captured on the next move, and that player does not have a move that will remedy this situation, then that player is said to be in checkmate Chess players should note that checkmate does not strictly end the game †removing the King (or Crown Prince) from the board by capturing it is the proper way to finish the game In practice, the game ends with checkmate See Also: Check
When one of your pieces attacks the enemy king, and he has no legal moves to escape from check, he is in checkmate and loses the game See the lesson Check and Mate