Here is a new variant: Back to the Past Chess. This is a cooperative game:
in Back to the Past Chess, both players WIN or both players LOSE the game.
Throw a coin, and the winner player must create a CHECKMATE position for
any of both bands. The other player must specify a NUMBER OF MOVES between
20 and 60. The object of the game is back to the starting position by a
sequence of inverse moves, i.e., from the end to the beginning, in a more
or less logical way (a blunder is not supposed to happen, unless both
players agree). If the starting position is reached in EXACTLY the number
of moves, both players win the game, or if not, both players lose it. The
moves one player makes can not be announced or discussed with the other
player, but the other player can only say: 'I disagree', in this case,
the player who moves can make another move. The maximum number of
take-backs must be specified at first. I have tried it yesterday. It is
much more difficult than supposed.
