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Subject: Re: Check Extension not Nullmove is the kley for 141

Author: Andrew Platt

Date: 09:29:08 09/30/04

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On September 30, 2004 at 11:13:28, Joachim Rang wrote:

>So my conclusion would be, if you have check extensions disabling nullmove does
>not help, if you have no Check Extensions it may help.

That's true in your engine but it's not the case in mine. In my case the null
move makes a critical difference because in the mating line it pushes it into
qsearch earlier which, in my engine, doesn't generate checking moves (unless
they are captures). This causes an additional ply to be needed to find it which
makes a critical difference.

BTW, as I posted before I find the key move early, just not the mating line. In
the last WAC run I did I found Qf4 in under a second.

Andy.



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