In chess, occurs when a king is under immediate attack (in "check") and there are no legal moves to escape that threat. It is the definitive end of the game, resulting in an immediate victory for the attacking player. 💡 The "CPR" Rule for Escaping Check

: Occurs when a king is trapped behind its own wall of pawns and is attacked by a rook or queen along the back rank.

un away by moving the king to an adjacent square that is not under attack. ♟️ Famous & Fast Checkmate Patterns