Author: Russell Reagan
Date: 15:42:07 04/24/02
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On April 24, 2002 at 18:37:40, Dann Corbit wrote: >On April 24, 2002 at 18:18:08, Eduard Nemeth wrote: > >>I played on the fritzserver a game comp.- comp. and in this position >>I seen, that the Tablebases here shaw only draw-move for white with Bd7! >> >>I'm not sure that all Grandmasters this move woult plays? >> >>(german: Ich bin mir nicht sicher dass alle Grossmeister disesen Zug sehen >>wuerden) >> >>[D]8/5k2/2B5/8/6pK/8/8/6r1 w - - 0 0 >> >>TBs says: Bd7 is only dwaw move Kg5 is a mate in 37 moves :) > >Not convincing. Play 1000 games of some program with tablebase files against >the same program without. The tablebase provides perfect accuracy, but slows >down the search. Les Fernandez did a long experiment and found that the result >was a push -- neither stronger nor weaker. Of course that was for the program >crafty only, so your actual mileage may vary. > >On the other hand, tablebase files do make programs play much prettier chess. >And they may help weak programs a lot (if they can make it that far). I've never understood why this would slow down the search. Either you have few enough pieces left to do a TB probe, in which case you do so and retrive a perfect evaluation and your search is over, or you don't have few enough pieces so you don't probe. It seems the only "overhead" is a single test to see if there are few enough pieces left on the board. What am I missing here? Russell
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