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Subject: Re: Crafty PVS question

Author: Alvaro Jose Povoa Cardoso

Date: 03:19:33 09/01/02

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>>Difference is that Crafty used alpha instead of value when it re-searches.
>>Is there any reason to use alpha instead of value?
>>Using value which is greater than alpha seems to cause more cutoffs than using
>>alpha.
>>
>>Thanks in advance.
>
>I do this only because it is possible to fail low on the re-search, and now you
>have the question of whether this fail-high/fail-low means anything.  I choose
>to go to the full window so that if it fails low, I know it is not good and I
>can ignore the fail high.  This is a null-move / hashing artifact that simply
>happens to anyone doing PVS, null-move and hashing, all together...


Just curious, if we removed null-move, would that artifact still happen?
In other words, would PVS+hashing cause that?

Regards,
Alvaro Cardoso





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