I'd rather not forbid only the FIDE-FIDE matchup. I'd prefer to allow it, but most important to me is that all the armies be treated symmetrically, i.e. if FIDE-FIDE is forbidden, all four same-army matchups should be forbidden.
CwDA is one of those games that includes FIDE Chess as a subgame, and I don't see a problem with allowing it to do so. It's worth noting that if the players choose their armies, then anyone with a sufficiently strong desire not to play FIDE-FIDE can avoid it by not choosing the FIDE army.
Also, we've already played Fischer Random Chess in this tournament. One FRC game in 960 is identical to FIDE Chess, and we didn't make any provision to prevent that from happening. Granted, the probability is somewhat higher in CwDA, but it's not all that bad. With unrestricted random assignment, there's about a 77% probability that FIDE-FIDE won't occur in the tournament.
CwDA is one of those games that includes FIDE Chess as a subgame, and I don't see a problem with allowing it to do so. It's worth noting that if the players choose their armies, then anyone with a sufficiently strong desire not to play FIDE-FIDE can avoid it by not choosing the FIDE army.
Also, we've already played Fischer Random Chess in this tournament. One FRC game in 960 is identical to FIDE Chess, and we didn't make any provision to prevent that from happening. Granted, the probability is somewhat higher in CwDA, but it's not all that bad. With unrestricted random assignment, there's about a 77% probability that FIDE-FIDE won't occur in the tournament.