Chess with different armies This army includes a lot of leapers, but most of them have asymmetrical move patterns, with backward moves being restricted. The rooks, knights, bishops, and queen are replaced by the following pieces: The four armies described above were playtested by Ralph Betza and selected as the most balanced ones. There are other armies, invented by Betza and other people, some of which are presented here. In the initial version of the game there were 8 armies and in these armies the king moved differently from the king in the standard chess. Instead of normal pawns, fairy pawns could be selected,
Infinite chess a checkmate. Theorists conceive of infinite chess variations to expand the theory of chess in general, or as a model to study other mathematical, economic, or game-playing strategies. For infinite chess, mathematical investigations have shown that in a general endgame, one player can force a win in a finite number of moves. More specifically, it has been found that infinite chess is decidable; that is, given a position (such as formula_1, and assuming pawns do not promote) of a finite number of chess pieces which are uniformly mobile and with constant and linear freedom, and (for example) White to move,