Author: James T. Walker
Date: 15:33:51 03/22/99
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On March 22, 1999 at 13:04:45, blass uri wrote: > >On March 22, 1999 at 08:02:52, Robert Hyatt wrote: > >>On March 21, 1999 at 21:04:55, James T. Walker wrote: >> >>>I played 100 games with Crafty 16.5 vs Crafty 16.5 with all 3/4 man tablebases >>>and a few 5 man tablebases in an attempt to determine how much help the >>>tablebases are. Has anyone else done this and if so, what was the result? >>>The final score was Crafty w/tb +32 =38 -30 or 51 to 49. The first 50 games >>>were very different from the second 50 games even though the match was >>>uninterrupted for the 100 games. >>> First 50 Crafty w/tb +21 =15 -14 >>> Second 50 " " +11 =23 -16 >>>It looks like two different programs. Just shows that even 50 games is not a >>>large enough sample to prove anything. I still don't know what the ELO gain is >>>from tablebases ! I'm planning on a couple hundred more games later this week. >>>If anyone else has done this (Bob?) please post your results. >>>Jim Walker >>>P.S. These were only Game/5 minutes. >> >> >>I haven't tried this and have no idea. I think the affect is 'minimal' but >>not insignificant, whatever that means. :) But against 'good' programs I see >>a fair number of tablebase games, that are likely won instead of drawn, or >>drawn instead of lost, only bacause of the tablebases. > >Maybe you do not know about cases when crafty is losing games because it is >slower because of tablebases >or cases when crafty prefer to go to a simple lost endgame instead of lost >tablebase endgame that the opponent can practically do a mistake and draw. > >Uri Hello Uri, Yes, I think it's possible that the tablebases help in some games and hurt in others and net result is almost zero ! So far the tablebase help is not measurable and that's the big surprise. Jim Walker
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