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Subject: Re: History Heuristic

Author: Ulrich Tuerke

Date: 06:43:46 07/06/04

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On July 05, 2004 at 21:59:38, Tor Lattimore wrote:

>Hi all.
>Is it a good idea to add capture moves to the history heuristic? It seems like
>it possibly might not be, but not sure if it makes a difference.

It seems to me that the history heuristic itself doesn't make too much of a
difference.
The last time, I had played around with it, I wasn't able to verify improvements
due to history heuristics; in some positions the history had helped, in others
it had slowed down the search a bit. However, I hadn't removed it because it
didn't cost much neither.

I suspect that its effects on the search had been more essential in the
pre-transposition table ages, when move orderings had been worse in general.

Uli

>Just as a side
>note, captures would never be put in killers because they get searched soon
>anyway yes?
>Cheers
>Tor
>and good luck to all WCCC entrants.



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