Author: Robert Hyatt
Date: 20:40:08 11/15/01
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On November 14, 2001 at 18:23:25, William Penn wrote: >On November 13, 2001 at 10:09:30, Robert Hyatt wrote: > >>How would you handle all the common zugzwang positions? black king at e6, >>white king at e4, white pawn at e3. White to move draws. Black to move >>loses. > >I would probably disregard them as being fairly infrequent in practical play >between chess masters. > >>There are plenty of positions where underpromotion is the only way to avoid a >>stalemate. That would convert many wins into draws. > >Stalemate is quite rare in practical play between chess masters and can be >disregarded. You are kidding, right? Zugzwang is a _critical_ part of simple endings. How can you _possibly_ overlook it as "quite rare". It is actually _quite common_. > >>7.5 gigs is a trivial amount of disk space today, with new machines usually >>coming with at least a 60 gig drive. > >Well, my hard drive is 12GB, so the size of the TBs is a factor for me. You can buy 70+ gigs for 120 bucks (US). > >Via simplifying assumptions based on the relative rarity of certain situations >in practical play, I think the endgame tablebases could be reduced to no more >than 1GB and still contain most of the strength which they presently offer to a >chess program. In other words rather than an elegant and complete endgame >solution, an incomplete (but sufficient) set of tables is probably do-able. But >I don't know how to code it. >WP
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