Author: Robert Hyatt
Date: 03:07:57 08/15/98
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On August 14, 1998 at 13:47:28, Bruce Moreland wrote: > >On August 14, 1998 at 13:12:32, José de Jesús García Ruvalcaba wrote: > >>In "Computer Chess II" by David Welsh and Boris Baczynskj (Wm. C. Brown >>Publishers, 1985), pp. 66-67, it is briefly described PAWNKING, a program >>developed by Helmut Horacek at the Vienna University (it was a result of a >>research about pattern recognition). It was able to play any kind of pawn >>endgame. >>Does anybody have more information about it? >>I know that it is an old book, but I still hope somebody can help. >>Thanks in advance. > >I don't have any information about the program, which is probably interesting. > >The position given as an illustration is also interesting: > >8/5p2/2k5/K7/8/1P6/8/8 b - - 0 1 > >The key is 1. .. Kd5. On a P2/300 my general-purpose program finds this in >under a second, but has some search instabilities and doesn't get a stable huge >plus score (+7) for about four seconds, this with endgame databases turned off, >of course. > >The book mentions that PAWNKING took ten minutes to get this answer on a CDC >Cyber 170/720, and "would take about 30 seconds on a Cyber 176". I don't know >how fast these machines are, so I can't compare effectively. the cyber 176 was a 1975-era machine, rated at 14 MIPS. Fast for its day (Chess 4.x used that for several years to thrash the rest of us). It would be *horribly* slow by any of today's machines.. > >It might be interesting to know what patterns they use. > >If you are interested in old stuff, you may want to check out PEASANT, which is >another K+P program. It is discussed in "How Computers Play Chess", and "Chess >Skill in Man and Machine" (Levy and Frey, respectively, probably both out of >print, the Levy book more recently so). > >Monty Newborn wrote Peasant, and I know he's still around. > >bruce
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