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Subject: Re: Some PV thoughts...

Author: Pham Minh Tri

Date: 14:43:57 11/23/00

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On November 23, 2000 at 08:46:36, Severi Salminen wrote:

>Hi!
>
>I managed to get my Principal Variation working. Now I have a simple AB search,
>with iterative deepening and I'm trying to search first the PV moves from last
>iteration. The strange thing is that I get very little savings in node count
>when activating the PV sorting. Could the reason be that 1. I evaluate only
>material and allready have captures tried first. 2.When I place the PV move in
>front of the queue I place one capturing move further away. I also don't have
>qsearch yet. How much should "normally" the total node count decrease when I try
>PV moves first in every ply?
>
>Severi

I have seen the same situation in my program. However, I always try the best
moves from hash table first, and those moves are very similar to pv moves. If
you have not hash table, something should be wrong. The easiest way to
experiment, download the TSCP and turn off its pv - the number of nodes will
increase notabbly.



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