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Subject: Re: new computer chess effort

Author: Amir Ban

Date: 12:59:10 12/21/99

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On December 21, 1999 at 13:12:28, Albert Silver wrote:

>On December 21, 1999 at 12:03:05, Amir Ban wrote:
>
>>On December 21, 1999 at 09:54:39, blass uri wrote:
>>
>>>On December 21, 1999 at 06:58:26, Amir Ban wrote:
>>>
>>>>I believe there are engines that take 90% for eval, but I'm pretty sure that no
>>>>first-rank engine does. This means that you have 10% left for all the rest, and
>>>>you have at least a 5-to-1 handicap in search speed against other engines.
>>>>There's no way to successfully compete with this kind of handicap.
>>>
>>>I guess that hiarcs7.32 use something close to 90% for eval.
>>>I think that it succesfully compete with this kind of handicap.
>>>
>>
>>No way.
>
>No way it is using close to 90% for the eval, or no way it is successfully
>competing with this kind of handicap? I presume you meant the first, since
>Hiarcs's successes speak for themselves. How much time do you think it spends on
>the eval?
>

Not very much. Hiarcs is a successful program, so I think its author discovered
that it's possible to do high quality evaluation without spending tons of CPU on
it. I think every top engine has found elaborate and ingenious schemes to do
that. To say that good evaluation is one that takes 90% processor time is not to
understand what computer chess programming is all about.

Hiarcs appears to be an engine with special search techniques, and I guess
that's were it spends much time.

Amir




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