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In chess
Chess
Chess is a two-player board game played on a chessboard, a square-checkered board with 64 squares arranged in an eight-by-eight grid. It is one of the world's most popular games, played by millions of people worldwide at home, in clubs, online, by correspondence, and in tournaments.Each player...

, a flight square or escape square is a safe place or a square
Chessboard
A chessboard is the type of checkerboard used in the board game chess, and consists of 64 squares arranged in two alternating colors...

 to which a King or other piece can move if it is threatened. A bishop
Bishop (chess)
A bishop is a piece in the board game of chess. Each player begins the game with two bishops. One starts between the king's knight and the king, the other between the queen's knight and the queen...

 sometimes begins to get hemmed in after Morphy's defense is used, and thus pawn to c3 may be used to create an extra escape square.

One way to get a king
King (chess)
In chess, the king is the most important piece. The object of the game is to trap the opponent's king so that its escape is not possible . If a player's king is threatened with capture, it is said to be in check, and the player must remove the threat of capture on the next move. If this cannot be...

 out of check is to move to a flight square on the next move. (The other ways to get out of check are to capture the checking piece or to interpose a piece to block the check.) If the checked king has no flight square and there is no other way to get out of check, it is checkmate
Checkmate
Checkmate is a situation in chess in which one player's king is threatened with capture and there is no way to meet that threat. Or, simply put, the king is under direct attack and cannot avoid being captured...

.

One way to win material from an opponent (that is to say, end up with more pieces or more valuable pieces left on the board) is to dominate
Domination (chess)
In chess, and particularly in endgame studies, domination occurs when a piece has a relatively wide choice of destination squares, but nevertheless cannot avoid being captured....

a piece by removing all of its flight squares (through attacking or occupying them), then threatening to capture it.
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