 In these variants, the same pieces and rules as in chess are used, but the board is different; It can be smaller or larger, the shape of either the board or individual spaces can be non-square or modular, or it can even be extra-dimensional or unbounded.The movement of pieces in some variants is modified in concurrence with the geometry of the gameboard.These variants introduce changes in the mechanics of the game, such as movement of pieces, rules for capturing, or winning conditions, using standard chess pieces.