The chess pieces are portrayed as characters which match the rank of the chess piece. They investigate the cognitive requirements and the thought processes involved in moving a chess piece. The Queen as a chess piece symbolises freedom of movement. Each type of chess piece has its own method of movement. Tenniel's first design was intended to give Alice the look of a chess piece. Any chess piece except the king may be sacrificed. He represents the chess piece of the same name. See Chess piece relative value for more discussion. The camel is a (1,3)-leaper fairy chess piece. Such an augmented queen piece is now known as the fairy chess piece "amazon". Their emblem is a knight chess piece with unicorn horn. Thus, the ferz is now considered a non-standard chess piece. The zebra is a fairy chess piece that moves like a stretched knight. Each chess piece belongs to a particular race and class, with individualized abilities. The valid moves of fairy chess piece wazir form the square lattice graph.