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Subject: Re: What is the q-search?

Author: leonid

Date: 06:10:54 01/08/00

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On January 08, 2000 at 00:49:53, Bruce Moreland wrote:

>On January 08, 2000 at 00:12:26, Antonio Dieguez wrote:
>
>>On January 07, 2000 at 20:28:26, leonid wrote:
>>
>>>Hello!
>>
>>hello!
>>
>>>What is the q-search?
>>>
>>>I found this experession few times but not sure what it signify.
>>
>>q-search is the extensions.
>>
>>>Thanks!
>>
>>you welcome!
>>
>>>Leonid.
>>
>>Antonio.
>
>qsearch is quiescent search.  It is a search that tries to drain the shallow
>tactics out of the search, so that the resulting "quiet" positions can be
>evaluted safely using an evaluation function that doesn't take into account
>shallow tactical threats.  It is what you use after you run out of search depth.
> "Extension" are usually used to keep a program from running out of search
>depth.
>
>bruce

Thanks you very much for your response!

But still I have one question. I am a little bit intrigated by your last
sentence. If you could reformulate or simply explain it, it will be nice.

"Extensions" are usually used to keep a program from running out of search
depth. My understanding was (probably very wrong) that extension are some kind
of addition search done for few next plys deep. If this is really so, how can
extension "keep program from running out of search depth"?

Thank you in advance!
Leonid.



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