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In chess and similar games, check is a condition that occurs when a player's king is under threat of capture on the opponent's next turn. A king so threatened is said to be in check . A player must get out of check if possible by moving the king to an unattacked square, interposing a piece between the threatening piece and the king, or ...
The possible ways to get out of check are: Move the king to a square where it is not in check. Capture the checking piece. Interpose a piece between the king and the opponent's threatening piece (block the check). [17] [18] [19] In informal games, it is customary to announce "check" when making a move that puts the opponent's king in check.
After this move, White cannot prevent the black king escaping the b1–h7 diagonal. The black king can play up the g-file to g6 and the white king has no option but to follow with opposition on the e-file to at least e5, otherwise the black king can escape to the third perimeter at f5 or f6. 83... Kg4 84. Be4. The black king can now escape to ...
A position in which a player's king is in check and the player has no legal move (i.e. cannot move out of or escape the check). A player whose king is checkmated loses the game. [79] chess annotation See annotation. chess blindness The failure of a player to see a good move or danger that should normally be considered obvious.
A piece leaves a square, and then later in the solution returns to it by a circuitous route (for example, a rook moves e3–g3–g5–e5–e3). Cf. switchback, in which the route taken to the original square is direct. royal piece In the context of chess variants, a piece subject to check and checkmate, as the king is in orthodox chess. [7]
In practice, this means that for each of the squares in the king's field, there is exactly one reason why the mated king cannot be moved to that square to escape check. [c] Some authors omit the detail that the mated king itself is attacked only once. [9] In his Dictionary of Modern Chess, Byrne J. Horton provided the following definition:
The king (♔, ♚) is the most important piece in the game of chess. It may move to any adjoining square; it may also perform, in tandem with the rook , a special move called castling . 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 immediately.
The triangle mate involves a queen, supported by a rook on the same file two squares away, delivering checkmate to a king that is either at the edge of the board or whose escape is blocked by a piece; the queen, rook, and king together form a triangular shape, hence the name of the mating pattern.