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Subject: Re: SSDF Rating Irregularities

Author: Bertil Eklund

Date: 23:39:25 12/09/99

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On December 09, 1999 at 22:58:28, Robert Hyatt wrote:

>On December 09, 1999 at 22:11:00, Len Eisner wrote:
>
>>The older programs on the SSDF list are underrated and the newer ones are
>>overrated.  Why is that?
>>
>>Bob Hyatt's view is that the best of the current programs are about 2450.  That
>>is at least 200 points less than their SSDF ratings.
>>
>>The older programs seem to be underrated by about as much as the new ones are
>>overrated.  For example, the Fidelity Mach IV is only rated 2074 when it should
>>be over 2250.  The old Novag Super Constellation is only 1731.  I know it was at
>>least 200 points stronger than that.
>>
>>Len
>
>
>I don't think the mach iv was anywhere near 2250.  It was at action chess
>(game/30/game/60) but not 40/2
>
>What I think has happened is that newer programs blow older ones out, and
>artificially inflate the newer program ratings, and artificially deflate older
>program ratings...
>
>The older programs are not played against each other any longer, and the only
>way their ratings can go is down...

Hi!

There is no or very little inflation in the list. Everyone knows that todays
better players play a lot with computers and therefore can find the "wholes" in
there play (proved by you). I guess an experienced player earns 50-150 points vs
the one that haven´t played computers. One of the only later results is from
south-america where Hiarcs6, Rebel10 and CM6000 on P2-400 performed in average
2603 over 10 or 11 rounds. These matches with Rebel with very motivated
( prepared) players and double-increment time controls have nothing to do with
the normal way of achieving an established elo (in tournaments). I think Rebel´s
about 2500 under these circumstances is pretty fair.

For the above most of the older programs haven´t moved much for years, but with
todays knowledge on chess-program they are over-rated to.

Of course we should adjust the level of the list as soon as we have some proper
results. I think the list shows the difference between the programs in a rather
good way. Anyone can adjust the list to what he/she thinks is the correct level.

Regards Bertil SSDF



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