RsBaby: Who called it an "odd rule"? I never once questioned it, or why it exists. MY point was that it is a lot of work for Fencer, and a considerably small result. If i were him, i would fix the games manually where that was a problem, but it really is up to him.

dream: Just for your info, there are chess rules that Fencer has not implemented here. And no one has complained about it! First, if there is a three-time repitition of the board, it is supposed to be an automatic draw according to the rules. Also, if 50 moves have elapsed without a capture or the movement of a pawn is to be a draw. The ONLY place i have ever seen thes is on zillions of games software (located at http://www.zillions-of-games.com/). But like this rule in backgammon, these are quite rare circumstances. And i have not heard anyone even mention them as a complaint.
At the very worst, let Fencer know if your opponent performs an illegal move of this sort, and he will fix it.