Erroneous league assignment

[GreatGonzales]

I think your concerns would be sufficiently mitigated by merely keeping the precise ELO score of every player confidential, much in the same way Outwitters does not communicate everyone's rank. Very simple. The problem you describe with playing multiple games at once, eh, I don't think that's a big deal. If ELO is secret, then there is no way to abuse the system. It will all even out in the end, and people will be placed as they should. That's the whole point of the leagues, right? That people are matched with players of similar skill level? I cannot think of a better way to do this this than ELO.