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Subject: Re: Null move and move ordering stats

Author: Dan Newman

Date: 15:31:41 12/20/01

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On December 20, 2001 at 16:47:29, Ren Wu wrote:

>On December 20, 2001 at 15:31:45, Dan Newman wrote:
>
>>I don't see anything wrong with these numbers.  I get 92.4% with nullmoves
>>and 98.7% without on this position.  But my program has hash tables.  It
>>also has a fairly complex (and heavily mistuned) eval.  When I run it on
>>all 300 WAC positions at 1s/posn I get much the same result (92 and 98).
>>
>>-Dan.
>
>What kind of move you search first in case you don't have the move from
>hashtable?
>
>Ren.

If I'm in the PV, I do an internal iterative deepening search and use
that move.  If not I generate the captures, sort them with a SEE,
and use the top one of those.

-Dan.

P.S.  I tried turning off my hash table and got 90.1% with nullmoves
and 99% without.  The searches took quite a bit longer...

• Re: Null move and move ordering stats Will Singleton 23:14:48 12/20/01
  • Re: Null move and move ordering stats José Carlos 06:27:01 12/21/01
    • Re: Null move and move ordering stats Will Singleton 08:33:48 12/21/01
      • Re: Null move and move ordering stats José Carlos 08:40:17 12/21/01
        • Re: Null move and move ordering stats Dan Newman 12:26:51 12/21/01
• Re: Null move and move ordering stats Ren Wu 15:44:48 12/20/01
  • Re: Null move and move ordering stats Dan Newman 23:06:29 12/20/01

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