Computer Chess Club Archives




Subject: Re: Repeatability (questions for Omid)

Author: Martin Giepmans

Date: 18:19:47 12/18/02

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On December 18, 2002 at 20:42:09, Omid David Tabibi wrote:

>On December 18, 2002 at 20:34:58, Martin Giepmans wrote:
>>>The tactical strength is not affected by the re-searches. They merely help >avoid
>>This is not true, Omid.
>>Nullmove pruning often overlooks tactical (and positional) threats
>>that are not related to zugzwang. Because of that some programmers use
>>(standard) verification search in every phase of the game.
>The major improvement comes from the continued search after a fail-high report,
>which detects tactical errors beyond the horizon of the original null-move
>search. Re-searches can also contribute to enhancing the middlegame tactical
>performance, but that additional improvement is usually negligible.

I don't understand what you are trying to say.
Without a research (if the verification search with reduced depth doesn't
give a cutoff) verification search would be pointless.
How could research result in a "negligible" improvement?
There is no other potential improvement ...


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