Castling Castling Castling is a move in the game of chess involving a player's king and either of the player's original rooks. It is the only move in chess in which a player moves two pieces in the same move, and it is the only move aside from the knight's move where a piece can be said to "jump over" another. Castling consists of moving the king two squares towards a rook on the player's first , then moving the rook to the square over which the king crossed. Castling may only be done if the king has never moved, the
Strategic move Strategic move A strategic move in game theory is an action taken by a player outside the defined actions of the game in order to gain a strategic advantage and increase one's payoff. Strategic moves can either be "unconditional moves" or "response rules". The key characteristics of a strategic move are that it involves a "commitment" from the player, meaning the player can only restrict her own choices, and that the commitment has to be "credible", meaning that once employed it must be in the interest of the player to follow through with the move. Credible moves should also be