Author: Uri Blass
Date: 23:48:48 08/11/03
Go up one level in this thread
On August 12, 2003 at 01:08:47, Anson T J wrote: >>Not only SSDF do that. Companies are selling incomplete CDs sets, users download >>only some TBs (I doubt many will download e.g.. kqqkb), etc. That is common >>practice. >> >>If program cannot properly handle such practice I'd call that program's fault, >>especially when ways to fix such a behavior are well-understood and discussed >>here (and in other forums) lot of times. Such program will lost half a point >>here and there, and in *my* opinion that's fair. >> >>If programmer still don't want to include proper fix, (s)he can modify the >>program, so (for example) it will not start with incomplete set, or will not use >>it, or will give large warning on startup, etc. >> >>BTW, those fixes will also lower product support costs... >> >>Thanks, >>Eugene > >I believe the Chessbase Fritz GUI warns you if you have an incomplete set of >tablebases and requires confirmation before proceding with a tournament game. I >don't think its fair to penalise an engine because the tester set it up >incorrectly. > >I can see why an incomplete set would cause problems but not how to solve it >easily. If a position yields a score of mate in 8 due to tablebases, but the >mate requires a transposition into a tablebase set that isn't present, the >program will be choosing between a mate in 8 and a score of say 9.00 if it >hasn't yet found the mate for itself. > >From Dr. Hyatts posts, I gather Crafty handles incomplete TBs, but how? If the score does not go down from mate in X to mate in X-1 then the engine can stop using the tablebases, forget everything and consider only moves that lead to positions that are not in the tablebases set that it has. Uri
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