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Subject: Re: Is my move ordering acceptable?

Author: Tord Romstad

Date: 12:21:15 10/31/03

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On October 31, 2003 at 10:49:43, Christophe Theron wrote:

>On October 31, 2003 at 07:17:17, Tord Romstad wrote:
>
>>On fast hardware, it seems to
>>me that you find the entire spectre from no qsearch at all (Junior)
>
>No QSearch at all?
>
>I have never run Junior of any of my computers, but I doubt it would be strong
>if it had no QSearch.

I have also never run Junior on any of my computers (I don't even have a
computer
where Junior would run), but rumors have repeatedly claimed that it doesn't have
a qsearch.  It seems really strange to me, too, and I am tempted to believe that
you and Uri are right and the rumors wrong.

>Either it has a QSearch but the QSearch nodes are not recorded (so they are not
>displayed in the main line), or it uses some kind of SEE to terminate the
>search.

Yes, if it really doesn't do any form of qsearch it will obviously have to use
some
kind of SEE, probably a very sophisticated one.

>>Is your "special system" mostly useful on slow handheld units, or do
>>you consider it to be very important even on fast hardware?
>
>It is mainly important on slow hardware. I could remove it in the PC version and
>one would hardly notice the difference.

That's what I guessed.

>But I repeat that working on the QSearch is important for all chess programs.

I am not so sure.  Crafty does rather well with a qsearch so simple that it
looks almost
ridiculous.  And although it is a bit weaker than the top programs, I don't
think the
simple qsearch is the main reason.

Tord



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