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Subject: Re: Cray Blitz - Ratings of the past false? Or are Current ones false ??

Author: Ray MacFadyen

Date: 04:05:19 07/27/99

Go up one level in this thread


On July 27, 1999 at 00:17:44, Robert Hyatt wrote:

>On July 26, 1999 at 20:03:50, Mark Young wrote:
>
>>On July 26, 1999 at 19:23:01, John Wentworth wrote:
>>
>>>After Cray Blitz won the 1983 World Computer Chess championship it's rating was
>>>2153. The Cray supercomputer from that time is still much faster than today's
>>>PC's ever dreamed of being yet Cray Blitz's rating was much lower than todays PC
>>>programs. In another post here, Robert Hyatt mentioned that Cray Blitz would
>>>beat Crafty based on hardware. So I guess my conclusion here is that either the
>>>rating of 2153 back in 1983 for Cray Blitz was way off or the estimated rating
>>>of Crafty and other current PC's are way off. In my opinion, Cray Blitz running
>>>on a Cray Supercomputer would still blow away any of the current programs
>>>running on any PC today. I guess I have to think that the rating of 2153 was WAY
>>>off. Any other opinions?
>>
>>Bob can correct me if I am wrong, but was not this rating based on games played
>>against humans, or computers that had ratings playing humans. If I remember
>>right, I think there was a prize for the first computer to achive and hold a
>>master rating playing humans of 2200 which I think Belle won. So I think the
>>rating may be pretty close to accurate because of this fact.
>
>Actually it was based on neither.  Ken had a rating program...  He computed the
>rating of Belle at 2200 based on it's USCF rating at the time of 2208.  Most
>of the rest were assumed to be 2000, for no particular reason.  The numbers in
>the crosstable are just TPR numbers...
>
>another case of taking a "rating estimate" as "the absolute rating"...
If crafty had a FIDE rating of 2450,for comparison purposes what rating could
cray blitz achieve running on the latest cray avalable ?
Yours sincerely
Ray Macfadyen



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