Author: Christophe Theron
Date: 08:22:24 11/10/01
Go up one level in this thread
On November 10, 2001 at 10:55:52, Thomas Mayer wrote:
>Hi Thorsten,
>
>>ok - you come with games : very fast PC, more
>>than 83 times faster, and want to estimate a rating.
>
>>i do it different.
>
>>we have then vancouver 68020 and the diamond 2 and very precise
>>ratings of them.
>
>>as far as i have played out the GAMBIT version of tiger14.6 for palm
>>beats them.
>
>well, but let the vancouver play against some engines on Athlon 1333. What do
>you think will happen ? Do you think the vancouver will get the rating the
>rating that it has on the SSDF list ? I doubt that.
Let me repeat it for the third time, and maybe you'll get it this time:
by letting very different players (in term of strength) play each other YOU GET
A RATING WITH A HUGE ERROR BAR.
For example if you let Chess Tiger for Palm play Athlon 1333 top programs only,
you are probably going to get an estimated SSDF elo of 1000 for Tiger, PLUS OR
MINUS 1500 points.
It's not about fairness. It's not about rating inflation. It's not about being
out of sync. It's about mathematical accuracy.
These matches are useless not because they are not fair.
They are useless because after playing them you have collected almost no
information, mathematically speaking.
On the other hand I agree with you on the fact that subtracting 100 elo points
to the bottom of the SSDF list was unfair, because accurate ratings had already
been established for those slow computers.
But this has nothing to do with the first point.
Christophe
>So the main point is: Rating lists with big hardware difference get extremely
>out of sync... As I have said, I don't see any reason why e.g. the vancouver
>get's weaker in the last some years ? Do you see any ? By the way, many of those
>old dedicated chess computers have proven their rating against humans, so it was
>a little unfair to them to reduce their rating by 100 points... As long as
>anyone claims that SSDF shows ratings compareable to human ratings... Agreed ?
>
>Greets, Thomas
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