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Subject: Re: Hashtable trick... or melon

Author: Andrew Dados

Date: 08:49:36 02/15/00

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On February 15, 2000 at 03:49:30, Inmann Werner wrote:

>On February 14, 2000 at 15:10:57, Andrew Dados wrote:
>
>> Let us consider a node at ply 0, where eval>alpha. We call qsearch, returned
>>score is < alpha. Now, at next iteration that position will also fail low
>>(assuming same alpha), because there will be no other moves for failing low side
>>then qsearch moves again...
>>So: we can store that score in HT with (depth + 1) instead of (depth) due to
>>above... or am I missing something? (I do that trick for a while, no side
>>effects found yet except for lower node count).
>>
>>(The above assumes same set of moves is being considered on all qsearch plys)
>>
>>-Andrew-
>
>Seems like an interesting thing, but I do not understand full, what you mean.

>1) You mean distance 0 , not ply 0 or? (last normal search node?)
yes - last search node before qsearch

>2) At distance 0, the eval>alpha comes from the evaluation function?
yes

>3) After qsearch, the eval < alpha comes back?
yes

>4) then you store at distance 0 in Hash wit 1 distance increased?
yes

>
>????
Somehow I managed to be vague in that post...

Andrew



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