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Subject: Re: Kasparov vs Deep Blue

Author: Chris Carson

Date: 16:08:49 05/30/02

Go up one level in this thread


On May 30, 2002 at 17:59:35, Amir Ban wrote:

>On May 30, 2002 at 13:34:25, Robert Hyatt wrote:
>
>>On May 30, 2002 at 13:19:45, Dann Corbit wrote:
>>
>>>On May 30, 2002 at 13:15:59, Jerry Jones wrote:
>>>
>>>>Does anybody know what the highest official ELO rating according to FIDE is that
>>>>was ever attained by a human, Kasparov that is.
>>>>Is it possible that a few years ago his rating was a few points higher ?
>>>>If Kasparov had declined to play Deep Blue, would this have influenced his
>>>>rating ?
>>>
>>>You can add one million points to his ELO rating if you like.  Or subtract them.
>>> Just be sure to do it to everyone else and it is perfectly valid.
>>>
>>>ELO figures are only valuable as differences within a pool of players who have
>>>had many competitions against each other.  The absolute numbers mean absolutely
>>>nothing.
>>
>>
>>This is a continual problem.  :)  32 degrees F means one thing.  32 degrees C
>>means another thing.  32 degrees K means another thing.  No way to compare
>>today's 2850 rating to the ratings of players 40 years ago.
>
>It is perfectly sensible to compare ratings of 40 years ago and even more to
>today's. That's because at no point in time did the pool of players change, with
>an old group completely replaced by another. The ratings are measured against
>the field, which changes continuously, and provides continuity of the ratings.
>
>So, even if Kasparov and Fischer never met (certainly Kasparov 2001 never met
>Fischer 1972), they had many common opponents, whose ratings where themselves
>determined by common opponents, etc. There's no more reason to assume that
>ratings in time are incomparable than to assume that ratings in the US and in
>Europe are incomparable, for, although most games are in one region, there are
>enough interregional games to give the ratings worldwide meaning.
>
>There are random fluctuations in the rating standard, because it's all
>statistics, but the numbers are large, and I'm not aware of anything that would
>cause ratings to systematically drift in any direction (actually this can be
>simulated effectively, by creating a random population of players and slowly
>change the pool over time and see if averages drift).
>
>Most strong players agree that the level of play is higher than 30 years ago,
>and that's a good enough reason why today top ratings are higher.
>
>Fischer, Alekhine, Capablanca are of course classics, but so are Johnnie
>Weissmuller and Jessie Owens, who would be today's also-rans. It is tempting to
>say that this is because today our clocks run slower than in their time, but
>they don't.
>
>Amir

ELO said that ratings can be compared, one of the reasons he created this
system.  Ofcourse you are right.  However, this will continue to be a debate.
:)



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