Правила классических шахмат

Checkmate

If a player's king is placed in check and there is no legal move that player can make to escape check, then the king is said to be checkmated, the game ends, and that player loses (Schiller 2003 :20–21). Unlike other pieces, the king is never actually captured or removed from the board because checkmate ends the game (Burgess 2000 :457).

The diagram to the right shows a typical checkmate position. The white king is threatened by the black queen; every square to which the king could move is also threatened; and he cannot capture the queen, because he would then be threatened by the rook.