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Subject: correction...

Author: Peter Kappler

Date: 22:08:10 01/11/00

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On January 11, 2000 at 21:41:01, Leon Stancliff wrote:

>  In my opinion the question as to whether the top microcomputer programs can
>play at grandmaster level has been answered. The average rating for the
>opponents of Rebel Century in the twenty games actually played was 2510 Elo. The
>average Mhz rating of the computers was 498. Rebel won by 11-9 which gave it
>55%.

I think something is wrong with your list of games.

There have been 21 games played at 40/2, with Rebel scoring 5 wins, 10 draws,
and 6 losses.  Here's a complete list:

Player	        Elo	Rebel	Hardware
Sorin	        2524	0.5	K6/3-600
Rohde	        2585	0	K6/3-600
Rohde	        2585	0.5	K6/3-600
Hoffman	        2501	0	K6/3-600
Anand	        2795	0.5	K6/2-450
Anand	        2795	0	K6/2-450
Ruzele	        2515	0.5	K6/3-600
Krivonosov	2432	0.5	P2-400
Zapolskis	2399	1	K6/2-300
Grabliauskas	2466	0.5	P2-350
Sherbakov	2541	1	K6/3-600
Zagorskis	2486	1	K6/3-600
Grabliauskas	2466	0	P3-500
Sakalauskas	2450	0	P2-350
Krivonosov	2432	0.5	K6/2-300
Baburin	        2593	0.5	K6/3-600
Sherbakov	2552	0	K6/3-600
Russek	        2398	1	K6/3-450
Russek	        2398	0.5	K6/3-450
Russek	        2398	0.5	K6/3-450
Russek	        2398	1	K6/3-450

By my numbers that's a 2491 performance rating.  Certainly a strong IM-level
performance, but not quite GM strength, and well short of what would be
necessary to actually achieve a GM norm.

Of course, Rebel wasn't playing on the fastest currently available hardware, but
at 40/2 it doesn't make a huge difference.  How much better it would score on an
Athlon 750 is another debate entirely - but I seriously doubt it would even
amount to another 50 ELO points if you're talking about 40/2 games against
humans.


>  The point differential for 55% wins is 35. When we add 35 points to 2510 we
>have 2545 Elo.  Rebel Century does play at grandmaster level. The question now
>will become, "Where does the top micro program rate among the world list of
>grandmasters?"
>  An Elo rating of 2545 would place Rebel Century at the 219th position out of
>652 living grandmasters. This places the program in the top third of the GM
>list. The only real live question now is "How long will it be before the top
>computers will among the top one hundred?" Will it happen within three years?

To me, it's more interesting to ask how long before it can crack the top 10,
which is roughly 2700 FIDE.  I think it might still be a very long time.

--Peter




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