Author: Uri Blass
Date: 01:52:56 02/21/05
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On February 21, 2005 at 00:17:09, Michael Yee wrote: >On February 20, 2005 at 10:39:47, stuart taylor wrote: > >>On February 20, 2005 at 10:36:22, stuart taylor wrote: >> >>>http://web.telia.com/~u85924109/ssdf/list.htm (any better?) >>> >>>According to this most recent ssdf list, doesn't it look like the past 2 >>>Shredders are the biggest challenges? >>>Not only that, but often, Shredder 7.04 got better results even than Shredder 8, >>>and here, it is only one point behind, which is nothing. >>>So the question is, has Shredder 9 got out of that hole, and become more >>>noticeably better, or not? >>>And, not always have upgrades of chess programs been stronger. >>>S.Taylor > >The CSS rating list shows Shredder getting stronger with each version: > >http://www.computerschach.com/rangliste/rangliste_ewig_ssdf.htm > >Different lists just show that computer chess has some randomness and it can >take a while for accurate strength estimates. > >Also, I think there are some subtle biases in the elo system that depend on the >strength difference between opponents. See, e.g., > >http://www.chessbase.com/newsdetail.asp?newsid=562 Thanks for that link. Some of these ideas are used by the israeli chess federation for years but I do not like them. 1)Using the linear formula: Surprise is always possible so it is never logical to give 0 points to the winner. You can claim that there is a better formula but we should try to find the best formula and not linear formula. 2)Using faster time control at the same rating. It is done in Israel for some years and I think that it is not fair because there are players who perform worse at faster time control. I played in the past in some tournaments at fast time control (30 minutes per game) and from experience I always lost rating in them. Results is simply that I stopped playing at them and I guess that my rating at 30 minute/game is probably 100-200 elo smaller than my rating at long time control. Uri
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