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Subject: Re:Aproximate "Performance Rating" for CM 9000 if Larry C. is 2559 >>>

Author: Jorge

Date: 09:23:26 10/01/02

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On September 30, 2002 at 01:35:30, Terry Ripple wrote:

>On September 29, 2002 at 20:46:09, Dana Turnmire wrote:
>
>>Anyone know what the performance rating is for the Chessmaster?
>--------------
>CM 9000 won with a score of 2.5-1.5
>
>CM 9000 shows an aproximate scoring probability of "62.5 percent"
>
>Larry Christensen's rating showed a "2559" in the match on ICC.
>
>According to the USCF's rating chart, the higher rated person who would win
>about 62.7 percent of his games would be about 90 points(USCF) higher rated than
>his opponent.
>
>If Larry's rating-(2559)is up to date, then "2559 + 90" = "2649" for CM 9000!
>
>)P.S. Remember, for the figures to be most accurate you need more games!)
>
>Regards,
>      Terry

This is open to a huge error margin, since the percentages are very sensative to
small sample, as you already know.  Is there a rule of thumb on how many games
should be played to have a better estimate (30 games maybe)?  Where can I find a
table based on % wins and Rating?

thnks,
jorge



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