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I don't have any reason to believe there is a problem.    The rating
system is not based on how well you do against the anchor player, it's
just a device to prevent long-term rating drift.   If the pool of
players were to inflate or deflate for any reason, the Anchor will not
drift with them and so WHOEVER plays the anchor will get corrections
which will propagate to all the players.

I have long considered setting up a lower-end anchor.  To do this, I
would let some fixed weaker player play for several weeks and then
average his rating over time to arrive at a good guess.   It should be a
substantial number of games to be accurate.  I think it takes about
50000 or more games to get within a couple of ELO points if we were
doing straight performance ratings, but I would setting for less - it
wouldn't be that critical for a low level player (and we could even
adjust it later based on more games.)


- - Don


Hideki Kato wrote:
> Hi Don and all,
> 
> There are many variants of MoGo run on CGOS 9x9 
> now  # http://cgos.boardspace.net/9x9/standings.html
> 
> I guess they force confuse the rating system because MoGo is the 
> strongest, programs have a match more frequently against MoGo than 
> anchors and get rating decrease in average.  If we had many anchors 
> running this would not happen.  Someday, in theory, it will converge a 
> balancing point but it may take so long time.
> 
> As I'm not familiar with the match-making and rating system of cgos, I 
> may be wrong.
> 
> gg (Hideki)
> --
> [EMAIL PROTECTED] (Kato)
> _______________________________________________
> computer-go mailing list
> computer-go@computer-go.org
> http://www.computer-go.org/mailman/listinfo/computer-go/
> 
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