Author: Uri Blass
Date: 11:09:03 06/26/02
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On June 26, 2002 at 13:53:11, Andrew Williams wrote: >Aha! > >This is a null-move problem, caused by a stupid bug in PM. My null-move >verification search was not working in this position. Now that I've fixed it, >this particular error doesn't occur. I'm still interested in what others see >here. > >Regards > >Andrew In that case how could PM find it? Movei is a null mover without null move verification and it had no problem to solve it. The main line is Kg3 h4+ Kh3 Rc2 I do not see no threat. The opposite. I see threats of Bg1 and Rxh2# so there is no zunzwang. Null move can cause a program to be slower but it cannot prevent a program to see it. The target of null move verification is to prevent the problem of zunzwang so I do not see how it can help here. Maybe you mean to say that your had a bug in the mate threat detector. Uri
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