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Subject: Re: A note about Rybka's "speed" and variation display

Author: Gian-Carlo Pascutto

Date: 05:02:16 12/05/05

Go up one level in this thread


On December 05, 2005 at 07:57:01, Daniel Shawul wrote:

>On December 05, 2005 at 07:53:56, Gian-Carlo Pascutto wrote:
>
>>On December 05, 2005 at 07:43:48, Daniel Shawul wrote:
>>
>>>On December 05, 2005 at 07:19:25, Gian-Carlo Pascutto wrote:
>>>
>>>>It seems to me that Rybka's seemingly slow speed is caused by not counting
>>>>quiescent nodes as search nodes.
>>>>
>>>>You can observe that Rybka's nodes per second drops dramatically in positions
>>>>where there are lot of forced check sequences.
>>>>
>>>>I am actually pretty sure of this because of 2 reasons:
>>>>
>>>>1) it never displays the parts of the variation coming out of the quiescent
>>>>search
>>>>2) it can solve mates with an unrealistically small nodecount
>>>>
>>>>--
>>>>GCP
>>>
>>> What if it doesnot have qsearch. It might be using sofisticated SEE.
>>
>>SEE doesn't solve mate in x problems.
>   But check extensions at horizon can. If combined with one reply , you
>don't need qsearch to solve long mates
>daniel

That's true, but that kind of setup doesn't invalidate my original point any
more.

--
GCP



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