Author: Uri Blass
Date: 00:06:18 10/19/00
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On October 19, 2000 at 02:41:09, Christophe Theron wrote: <snipped> >It looks indeed fine. > >Did you learn this rule, Uri, or did you invent it yourself? > >I have never heard it before. > > > > Christophe I did not learn it in books but invented it. I told Amir Ban about my rule in august 1998 but amir did not use it and prefered to use only the file of the black king. It was a practical problem with Junior because Junior could do stupid mistakes because it stopped to search when it assumed that the position is a draw. Junior could lose simple draws of KBP vs K in my tests because of this problem. Amir added the difference between the rank of the kings to reduce the problem but it is still possible to win KBP vs K against Junior5.9. [D]8/6k1/8/5K2/8/7P/2B5/8 b - - 0 1 Junior plays Kh6 that is losing. It assumes the position is drawn by Junior's rules and simply stop to search after Kh6. I guess that the problem is solved in Junior6 only because of tablebases. Uri
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