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Subject: Re: probably a nullmove/zugzwang effect

Author: Robert Hyatt

Date: 13:14:08 01/08/04

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On January 08, 2004 at 15:29:51, Mike S. wrote:

>On January 08, 2004 at 14:17:52, Drexel,Michael wrote:
>
>>I can reproduce it with Cb-native Crafty 19.06 and Crafty 19.08.
>>
>>Crafty 19.06 - Hiarcs 9
>>8/6r1/8/5p1B/5N2/4k1K1/8/8 w - - 0 1
>>
>>Analysis by Crafty 19.06 CB:
>>
>>1. = (-0.01): 137.Bg6 Rxg6+
>>2. = (-0.01): 137.Ng6 f4+ 138.Kh4 Rh7 139.Ne5 Rxh5+
>>3. -+ (-#15): 137.Kh3 Kxf4
>>4. -+ (-#15): 137.Kh2 Kxf4
>
>I cannot reproduce Bg6?? with cb-native Crafty 19.06 on a Pentium 3/700 MHz,
>using 4-piece tbs. (+ all rook vs. rook-tbs which don't matter here):

You need 5's and it will happen _every_ time.  There is something wrong, and
I don't believe it has anything to do with null-move here....




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