Kriegspiel (chess) follows. The game is played with three boards, one for each player; the third is for the umpire (and spectators). Each opponent knows the exact position of just their pieces, and does not know where the opponent's pieces are (but can keep track of how many there are). Only the umpire knows the position of the game. The game proceeds in the following way: The umpire announces: Pawn promotions are not announced. Kriegspiel is sometimes used in chess problems. In these, usual variations introduced by different black moves are replaced by variations introduced by different announcements. An example of a
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