Chess 2: The Sequel create a more dynamic opening game, decrease the emphasis on openings memorization, and reduce draws. In "Chess 2", players may choose from six unique armies, such as an army with two kings and an army whose knights, bishops, and rooks may move like each other when adjacent. A new win condition has been added: a player wins if their king travels past the fourth rank. This was intended to prevent traditional "solved" chess endgames, which can be played by consulting a chess tablebase, and therefore does not require player skill. A third rule change from standard chess is the dueling
Three-player chess avoid this "petty diplomacy" problem by determining the victor as the player who first delivers checkmate, with the third player losing in addition to the checkmated player. Other solutions have been tried as well. Some variants use a board with hexagonal cells. Usually three bishops per side are included, to cover all cells of the hex playing field. Pieces move usually as in one of the versions of hexagonal chess. Some variants use a hexagonal-shaped board with quadrilateral cells (see example in the photo). Some variants have used other board shapes with quadrilateral cells. Triangular cells not on the perimeter