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Subject: Re: Crafty and Cray Blitz Questions to Prof. Hyatt

Author: Joshua Lee

Date: 06:03:49 10/10/00

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>
>You will have to rephrase your question a bit.  But to help, if you meant
>"can crafty on the quad xeon play with Cray Blitz on the T90?" the answer
>is _NO_.  CB on the T90 runs at around 7M nodes per second, about 7X faster
>than the quad xeon.  I wouldn't want to play such a handicap match.
>
>On the other hand, if you mean "Can Crafty, on the best box you can get today
>play with CB on the T90?" the answer is yes.  I have some data from Tim Mann's
>21264a machine which is about as fast as my quad xeon, but using a single cpu
>at 667 mhz.  A 16 cpu machine would be faster than Cray Blitz.  And I would
>expect it to win more than it would lose, although I think it would be pretty
>close.

Great that answers that question to recap singular extentions, King safety,
selectiveness near the leaf positions in CB , while crafty probably has more
positional(particularly endgame) knowledge.

What do the Vectorizable algorithms do?
What were the NPS of crafty in later years? I know there were several Cray
versions but thats about it.

I think another good question is if the two were on compareable systems which
isn't likely do to cost (if i get a multi-cpu alpha i'll let you know) would the
two be fairly equal maybe 45% for crafty?

Lastly What has been the most difficult thing for you to put into crafty or CB,
what are your plans with crafty, What can't you put into it? I ask this one
because i know there are certain things in chess computers don't understand and
i know that when botvinnik was working on his computer it was difficult to
translate his ideas...


Thanks again for your time i could talk your head off.




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