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Subject: Re: Crafty-IsiChess,CCT4,r11 ==> A move to avoid?

Author: Dann Corbit

Date: 13:54:20 01/29/02

Go up one level in this thread


On January 29, 2002 at 16:43:28, Roy Eassa wrote:

>On January 29, 2002 at 16:36:23, Thomas Mayer wrote:
>
>>Hi Roy,
>>
>>>>Wow, Fritz 7b is blind to this one.  It does not see in advance that 37...Nxe5
>>>>is good for Black (it thinks Black is down more than 3 pawns).  Must be
>>>>null-move / zugzwang, right?
>>>
>>>
>>>To be more specific, in the following position Black can play ...Re6 and be in
>>>very good shape (certainly not behind).  However, Fritz 7b evaluates this
>>>position as being better for White by about 5 pawns:
>>>
>>>[d] 8/8/1p1r1k2/p1pRN1p1/P3K1P1/1P6/8/8 b - - 0 2
>>
>>strange... Quark fully disagrees and thinks that black is little bit better...
>
>
>Quark is right.  Fritz is wrong.
>
>I guess this is a very good example of a blindness caused by using null move.
>
>My question is, do all zugzwang positions confound null move, or only some?

Since Thomas uses NULL MOVE in Quark, it makes you wonder what could be causing
the blind spot for Fritz?  Using it past the time when it is appropriate
perhaps?



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