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Subject: Re: Root move ordering - an experiment

Author: Pallav Nawani

Date: 11:10:52 09/28/04

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On September 27, 2004 at 23:45:54, Stuart Cracraft wrote:

>I experimented with reordering root ply at iterative depth iply >  1
>where 1 is the root ply, with the results of iply-1 sorted by the
>The advantage  of sorting root node by subtree is the simplicity.
>It eliminates about a half a page of code and introduces
>about a quarter page of code for only slightly lesser results
>(within 1-2% of my current result) so that is good.
>
>Still I think I'll leave it #ifdefed out for now and use it as
>a baseline that is only improvable upon with handtuning of my
>current methods and others to be discovered.
>
>Stuart


By sorting moves at root by subtree nodes I gained a 5-7% reduction in tree
size.

You should be measuring the reduction in the number of nodes your program was
seeing at depth x, and NOT THE RESULTS IN WAC.

Regards,
Pallav



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