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Subject: Re: Verified Forward Pruning

Author: Renze Steenhuisen

Date: 13:09:10 10/24/05

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On October 24, 2005 at 15:41:28, Robert Hyatt wrote:

>On October 24, 2005 at 13:38:02, Premraj Natarajan wrote:
>
>>I just came across a article that tells about verified Forward pruning instead
>>of normal forward pruning. I am not sure if today's chess engines have
>>implemented i hope developers would look into this and implement if it really
>>helps.
>>
>>http://www.cs.biu.ac.il/~davoudo/pubs/vrfd_null.html
>>
>>bye
>>Premraj
>
>
>This is old.  Several tried it.  I don't know if anyone uses it, as it really is
>an efficiency issue that slows null-move search down due to the verification
>search overhead...

If I recall correctly from the paper this was a minor issue, or was at least
compensated for by the gain in performance (on the test set). My personal
experience, however, was a major slowdown but I did not yet test it on a
reasonable sized test set.

Cheers

Renze



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