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Subject: Re: Playing Strength

Author: vitor

Date: 17:27:29 07/29/99

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>
>The win expectancy is identical for a 300 point difference no matter where it
>occurs in in the rating scale.  The different "k-factors" control the rate at
>which the ratings follows results but they do not control the ultimate values
>the ratings attain.
>
>More specifically, the ratings for people below 2100 USCF are approximately the
>average of their performance rating for their last 25 games.  For people in the
>2100-2300 bracket, they are the average of the last 36 games, and for people
>above 2300, they are the average of the last 50 games.
>
>Cheers,
>
>Walter

absolutely right. so i shouldve said the consistency of someone rated 2500-2800
is greater than... the problem with a lower k-factor is that your rating is less
likely to reflect your current strength. kasparov's tpr for this year is
probably 100 pts higher than his rating. of course, if youre slumping, that
lower k-factor becomes your friend.



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