Author: Robert Henry Durrett
Date: 09:11:57 06/21/02
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On June 21, 2002 at 10:24:11, Uri Blass wrote: >On June 21, 2002 at 09:24:04, Richard Pijl wrote: > >>On June 21, 2002 at 08:53:00, Robert Henry Durrett wrote: >> >>>On June 21, 2002 at 06:28:27, Kurt Utzinger wrote: >>> >>>>On June 21, 2002 at 04:38:04, Uri Blass wrote: >>>> >>>>>[D]8/8/8/5P2/1p1b4/pNk5/K7/8 b - - 0 103 >>>>> >>>> >>>>There is no chance for today's computer programs to see that this is a draw. >>>>Even without the white pawn, none of the 20 programs tested by me have an idea >>>>of draw. >>>> >>>>Kurt >>> >>>Why, specifically, is this true? [I do not challenge the statement, but ask >>>about the software.] >>> >>>What, specifically, would have to be done to a chess engine to make it see these >>>things? >>> >>It doesn't seem very difficult to add this knowledge, just a matter of doing it. >>The problem is that white has sufficient moves to avoid zugzwang, the squares >>before the pawns are controlled by white and the bishop is of the wrong color, >>not able to support the advance of the pawns. >>Richard. > >Yes 6 squares is practically enough to avoid zunzwang when the danger of threat >is only from a king and a bishop > >The bishop can control 4 and the king can control 2 but they cannot control all >the relevant 6 different squares. > >king at e2 and bishop at e5 can control 6 different squares that the knight at >e4 controls but the knight at e4 has 8 legal moves and when the knight has only >6 legal moves it is not possible. > >Uri To me, the real issue is whether or not the given position is representative of a class of positions which present the same sort of problem, as opposed to being an isolated case. Introducing knowledge specific to the given position would surely be a waste of time. The "fix" needs to be for an entire class or type of position. Is the given position representative of a large number of other positions for which modern chess engines all have the same problem? If so, what would all of these positions have in common? Is there a "fix" which would make everybody happy? Bob D.
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