A little more information on what CrazyStone's real performance on KGS has been like during the time the graph depicts:
http://www.gokgs.com/gameArchives.jsp?user=crazystone&year=2007&month=3 http://www.gokgs.com/gameArchives.jsp?user=crazystone&year=2007&month=4 http://www.gokgs.com/gameArchives.jsp?user=crazystone&year=2007&month=11 http://www.gokgs.com/gameArchives.jsp?user=crazystone&year=2007&month=12 In March 2007, CrazyStone starts to play some rated games after a long time without playing. It's initially [?] (totally unknown rating). It starts with a lucky streak, and gets up to 1k. Then in April it plays some more, and the rating settles to weak 2k. It continues to play many games and stabilizes there. Then in November/December 2007, I assume a new version started playing (I remember reading somewhere it was new version. Or perhaps just better hardware). It quickly settled to a strong 1k. But in Nov/Dec it played only 12 rated games, so the sample size is quite small. Then it quit playing again. When such a small sample size, it's rating is very sensitive to "drift". KGS uses a maximum likelyhood algorithm. So if any of CS's 12 opponents gets stronger/weaker, CS will drift with them. I assume that is what caused it to move to 1d. Don asked if he could play some games, stop, and have is rating increase. The answer is yes if your opponents' ratings increase. If your opponent's ratings decrease, you'll go down instead. Generally for low kyu players, everyone is improving quickly so there is a strong upward drift. It's usually not so bad for the strong kyus or dans since those players don't generally improve very fast. However as I said in this case CS has only played 10 games, so a much smaller pool of opponents is involved. - Andy On Jan 31, 2008 12:59 PM, Andy <[EMAIL PROTECTED]> wrote: > CrazyStone hasn't played since the initial spike to 1k in December. The > movement of the chart afterwards is "rating drift". > > > On Jan 31, 2008 12:49 PM, Gian-Carlo Pascutto <[EMAIL PROTECTED]> wrote: > > > Don Dailey wrote: > > > > > I don't know how David figures 1000 ELO, but I would expect the > > > difference to be much larger than that for 19x19 go. I don't > > believe > > > they are yet very close to 1 Dan. > > > > http://www.gokgs.com/graphPage.jsp?user=CrazyStone > > > > You're right. They're closer to 2 Dan. > > > > :) > > > > -- > > GCP > > _______________________________________________ > > computer-go mailing list > > computer-go@computer-go.org > > http://www.computer-go.org/mailman/listinfo/computer-go/ > > > >
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