Computer Chess Club Archives




Subject: Re: Verified Null-moving

Author: Dan Honeycutt

Date: 19:56:21 08/12/04

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On August 12, 2004 at 09:31:15, Tord Romstad wrote:

>On August 12, 2004 at 09:25:11, Anthony Cozzie wrote:
>>Pure R=3 only works for people that do checks in Q-search.
>>Examples: Zappa, Gothmog (although tord plays games with his R), and I think
>A minor correction:  Gothmog doesn't always search checks in the qsearch.
>I haven't collected any statistics, but my guess is that in the majority
>of the qsearch nodes (even at the first level of the qsearch), it decides
>that searching checks is not worth the effort.
>Perhaps that is why I have to play games with my R.

Hi Tord.
How do you decide whether to search checks in qsearch?  Im presently tinkering
with searching checks:

1) Always (1st ply of qsearch only)
2) If Eval() close to alpha (ie, i don't "need" to capture to get to alpha)
3) If no captures (that bring me to alpha) found

I have little data but none of the above have shown much promise so far :(

Dan H.

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