Author: blass uri
Date: 10:04:45 03/22/99
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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
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