The board is set-up as for a normal game of chess. The moves and sequence of play are not changed. Before the start of play, however, each player takes an extra knight which is placed "in a pocket". Once during the game, the player may put this extra knight on any free square on the board. The knight may be placed to give check or checkmate. The only restriction is that the space must be empty. Placing the pocket knight is instead of making a normal move. After this, the additional knight moves as usual. [i]NB: It is recommended that the knight be put in a pocket, or at some distance from the board, so that it is not confused with pieces which have been captured during the game.[/i] Pocket Knight Chess can also be played with no additional pieces, just two knights per player. In this version, each player removes a knight from the opening set-up prior to starting play. This knight becomes the "pocket knight". The "same" knights should be taken by each player (i.e. both remove their Queen's Knight).