Fairy chess piece movement. Combining multiple movement letters into a string means the piece can use any of the available options. For example, WF describes a king, capable of moving one space orthogonally or diagonally. Standard chess pieces except pawns (which are particularly complex) and knights (which are a basic leap movement) have their own letters available; K = WF, Q = WWFF, B = FF, R = WW. All mentioned capitals refer to a maximally symmetric set of moves that can be used for both moving and capturing. Lowercase letters in front of the capital letters modify the component, usually restricting the
Chess is under attack, or a stalemate (a draw) if the king is not. Each chess piece has its own way of moving. In the diagrams, the dots mark the squares where the piece can move if there are no intervening piece(s) of either color. Once in every game, each king is allowed to make a special move, known as "castling". Castling consists of moving the king two squares along the first rank toward a rook (which is on the player's first rank) and then placing the rook on the last square that the king has just crossed. Castling is permissible