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

Author: Gian-Carlo Pascutto

Date: 13:12:20 10/28/99

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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.

--
GCP



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