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Subject: Re: PVS or AlphaBeta? Tiger does BOTH!

Author: Christophe Theron

Date: 17:05:20 10/28/99

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On October 28, 1999 at 16:12:20, Gian-Carlo Pascutto wrote:

>On October 27, 1999 at 22:06:12, Christophe Theron wrote:
>
>>I use both PVS *and* simple alphabeta in Chess Tiger. I got a speedup from
>>detecting where PVS was good and where AB was better...
>>
>>
>>    Christophe
>
>Interesting. I've been using the same idea since Sjeng III and also
>got good speedups.
>
>In some situations where move ordering goes bonkers it helps a lot,
>and you still get the PVS speedup in normal situations.
>
>How do you detect whether AB or PVS is better?
>
>For Sjeng, I check how good the move ordering has been up untill now,
>and if it's been "reasonable", use PVS.

Well I don't want to reveal too much about this, but it's a little bit as you
said.


    Christophe



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