David Fotland: <028001cb6a5a$3522dff0$9f689f...@com>: >Don, > >Can the CGOS 19x19 starting rank be changed from 1200 to 1800? Almost all >programs are now stronger than gnugo on 19x19. With the 1200 start it takes >a very large number of games to climb over 2200, and by then the K value is >so small that the top programs take a huge number of games to accurate >ratings. The bayeselo and regular ratings are very different, I think >mainly due to this problem.
This will only reduce the number of earlier games. There are two problems in current rating algorithm of CGOS, I think, and I'd like to propose periodical copy of the bayeselo rating values to current ones. The first is a big rating gap between top level programs and the anchor, ie, 2700 or 2800 (according to bayeselo but 2500 in daily rating) and 1800 of GNU Go. Assuming there are only two programs, Zen and GNU Go, for example, Zen needs about ten wins (I have no exact number) to get one Elo point so that Zen will take several months to reach 2800 Elo. The other is a strong newcomer program. If a strong program loses a game against the newcomer, its rating significantly drops and never be recovered, AFAIK. KGS has a recovery mechanism for this. (If CGOS also has this, I'm sorry.) Those two problems are not solved (perhaps, relaxed a little) by just changing the initial rating from 1200 to 1800. Current rating system of CGOS has been working fine for many years on (human) Go clubs, right? The strength of a (human) player changes much more slowly than a program and human players stay much longer than programs because programs frequently get version-up. Hideki -- Hideki Kato <mailto:[email protected]> _______________________________________________ Computer-go mailing list [email protected] http://dvandva.org/cgi-bin/mailman/listinfo/computer-go
