Author: Dave Gomboc
Date: 22:18:48 09/14/01
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On September 14, 2001 at 16:30:36, Rafael Andrist wrote: >On September 14, 2001 at 10:31:49, Robert Hyatt wrote: > >>On September 13, 2001 at 02:09:45, Dave Gomboc wrote: >> >>> >>>The opposition is a special case of coordinate squares. >>> >>>The theory of coordinate squares have existed since long before 1984. >>> >>>Dave >> >> >>Didn't mean to imply otherwise. Bratko was simply a pawn-ending expert that >>worked with Danny. He explained the idea behind "coordinate squares" to me >>while we were discussing specific "anti-levy" ideas after we had lost the >>first two games in classic anti-computer style. We somehow got onto some >>obscure endgame position in the discussion and he explained how this worked. >>We then drifted to the endgame (K+P) solver Newborn had done, and the we >>got to fine 70 and chess 4.x's 23 minute solution (newborn predicted his program >>would take years to solve that one) and as Bratko showed how coordinate squares >>were important there, I decided to play with it after the Levy match ended. >> >>I always assumed the idea had been around for not just years, but hundreds of >>years. Just like opposition, distant opposition, etc. > >The idea of co-ordinated squares came up with a publication from Lasker 1901. >BTW, the "Fine #70" is composed by him. The theory was developped mainly after >the 2nd World War. I recommend you Averbakhs book about pawn endings. Even if >you are not interested in implementing them in Crafty, there is lot of other >useful stuff in this book. > >Rafael B. Andrist The only problem is where to get that book!? I have not seen a (used, of course) copy for sale for 5+ years. Dave
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