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
Sacrifice (chess) Sacrifice (chess) In chess, a sacrifice is a move giving up a piece with the objective of gaining tactical or positional compensation in other forms. A sacrifice could also be a deliberate exchange of a chess piece of higher value for an opponent's piece of lower value. Any chess piece except the king may be sacrificed. Because players usually try to hold on to their own pieces, offering a sacrifice can come as an unpleasant surprise to one's opponent, putting him off balance and causing much precious time to be wasted trying to calculate whether the sacrifice is sound or