Author: Uri Blass
Date: 10:38:31 03/17/01
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On March 17, 2001 at 13:04:29, Antonio Senatore wrote: >It seems incredible that a top chess program like Junior 6 (without the KPPKB >tablebase but with the KBK and the KBKP tables) CAN'T SEE MATE IN ONE in the >next position: > >7k/4pK1p/7B/8/8/8/8/8 w - - It is not a bug It is a design decision by the programmer. Junior knows that king bishop with not more material cannot mate and the same for king knight with no more material. It practically help Junior in games because Junior simply does not have to search in KB vs KPP positions unless it evaluates the position as advantage for the side with the pawns. I believe that you can change the default parameters if you prefer a weaker program that can see the mates in the position that you posted. Experience tells that they never or almost never happen in games so the programmer(Amir Ban) did not care about them. Uri
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