I'm not surprised that the data for games with 90% winning chances is lacking. The McMahon pairing system is widely used in western go tournaments to prevent mismatched games, because most players don't like mismatched games (either as the stronger or the weaker player). Rating systems are relatively new in the go world and they don't seem very popular (or even known) in the far east where 99% of the go population lives. So I guess go rating systems are still quite immature: AGA, KGS and EGF all have different conversion functions to map winning probability to dan and kyu ranks. These conversions are probably based on different statistical data sources and probably also on other considerations like calculation convenience and different theoretical considerations of their inventors. Dave
________________________________ Van: [EMAIL PROTECTED] namens Don Dailey Verzonden: do 4-9-2008 20:55 Aan: computer-go Onderwerp: Re: [computer-go] Kaori-Crazystone Here is something interesting from this page: Note how different the expectations of each system are regarding even games between players of unequal strength. If you can win 90% of even games against a 2 kyu player, the AGA believes you are 1.33 ranks higher, the EGF believes you are 2.42 ranks higher, and the IGS believes you are 2.80 ranks higher. The lack of agreement stems from a tradition of playing handicap games between players of different ranks, so there is a lack of data regarding non-handicap games between mismatched opponents. - Don On Thu, 2008-09-04 at 11:02 -0700, terry mcintyre wrote: > This page http://en.wikipedia.org/wiki/Go_ranks_and_ratings gives a table of > win probabilities versus rank differences. > > I haven't yet found such a table for handicap games. > > Terry McIntyre <[EMAIL PROTECTED]> > > > "Go is very hard. The more I learn about it, the less I know." -Jie Li, 9 dan > > > > _______________________________________________ > computer-go mailing list > computer-go@computer-go.org > http://www.computer-go.org/mailman/listinfo/computer-go/ _______________________________________________ computer-go mailing list computer-go@computer-go.org http://www.computer-go.org/mailman/listinfo/computer-go/
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