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Subject: Re: PV moves extensions

Author: Robert Hyatt

Date: 14:30:22 08/30/01

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On August 30, 2001 at 16:41:27, Alvaro Jose Povoa Cardoso wrote:

>Should we extend a PV move? If so, by how much? 1/4th of a ply, 1/3rd of a ply?
>From my experiments it only helps in some positions and only detects mate
>sooner, but "allways" with a tree size increase.
>As a side question, how do I identify a PV move?
>Using PVS I assume a PV move is when alpha <> beta-1.
>Am I right?
>
>Thank you in advance,
>Alvaro Cardoso


Probably better is to save the original alpha/beta values at the root,
and compare to those.  If current alpha = root alpha, and current beta =
root beta, you are definitely on a PV move search.

• Re: PV moves extensions Steve Maughan 03:28:25 08/31/01
  • Re: PV moves extensions Robert Hyatt 06:01:17 08/31/01
    • Re: PV moves extensions Steve Maughan 08:15:33 08/31/01
      • Re: PV moves extensions Robert Hyatt 09:15:07 08/31/01
        • Re: PV moves extensions José Carlos 10:06:06 08/31/01
          • Re: PV moves extensions Miguel A. Ballicora 12:06:05 08/31/01
• Re: PV moves extensions Alvaro Jose Povoa Cardoso 14:56:58 08/30/01
  • Re: PV moves extensions Robert Hyatt 15:19:09 08/30/01

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