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Subject: Re: Is Shredder's secret simply search dept ?! (Some figures here)

Author: Uri Blass

Date: 15:43:19 12/20/04

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On December 20, 2004 at 18:31:56, Dann Corbit wrote:

>On December 20, 2004 at 18:27:37, Uri Blass wrote:
>
>>On December 20, 2004 at 18:22:24, Dann Corbit wrote:
>>
>>>On December 20, 2004 at 16:32:24, Jouni Uski wrote:
>>>
>>>>Shredder 8 reaches quite stunning averaga search dept. E.g. with only 15
>>>>second/move average with Pentium 2400 and 128MB hash it averages 15,2 ply! For
>>>>comparison Fritz Bilbao and Gandalf 6 reach both same 12,7 ply. No wonder
>>>>Shredder beats them 13 - 7 and 14 - 6. Of course 2,5 ply is a lot difference!
>>>>Is there any amateur or pro engine, which can equal Shredder in depth - Junior's
>>>>half plys can be forgotten.
>>>
>>>I can write an evaluation function that only counts the wood.  It will beat
>>>Shredder's depth, but Shredder will easily kill it on a 1/10 as powerful machine
>>>all the time.
>>
>>Only writing evaluation  that only count wood will not be enough to beat
>>shredder depth.
>
>A simple PVS with null move and wood counting only will get 19 plies in a few
>seconds.  Is that what you mean by pruning?


In what position?
I never had only wood counting but I guess it is dependent on the position and
in tactical position when there are many threats to win material it may get
smaller depthes.

Uri



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