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Subject: Re: What is the q-search?

Author: leonid

Date: 05:35:59 01/09/00

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On January 09, 2000 at 01:53:23, Bruce Moreland wrote:

>On January 08, 2000 at 12:41:13, Antonio Dieguez wrote:
>
>>On January 08, 2000 at 11:56:25, Dan Andersson wrote:
>>
>>>>"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"?
>>
>>that phrase traduced to spanish is not very clear I suppose you have the same
>>little problem, may be keep program from running out means keep program running
>>in ?
>>
>>>You said it yourself! By adding more depth.
>>>
>>>Regards DAn
>
>You start out with some number of plies of depth, like for instance 8, and every
>time you make a move you decrement.  So if you have 8 now, you make a move and
>now you have 7.  Then you make a move and have 6, etc.  Eventually you have 0,
>and you cut to qsearch.
>
>Let's say you have 8 now, and an extension kicks in.  You still have 8.  Another
>one kicks in, and you still have 8.  So you avoid running out of remaining
>depth.

Thanks! Now I understood. It was nothing more but wording that confused me.

Leonid.

>
>Other ways to do it but that's good enough.
>
>bruce



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