Author: Imran Hendley
Date: 09:21:24 03/13/00
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On March 13, 2000 at 10:02:59, James T. Walker wrote: >Hello, >I have revisited an old test I ran over a year ago trying to determine the value >of tablebases. Last time I ran Crafty with tablebases vs Crafty without >tablebases and the result showed only about 5-10 points value for tablebases. >That test was terribly flawed in that I only had a few 5 man tablebases and did >not have the important KRPKR. This time I had about 4 Gig of >tablebases(Compressed) available for Hiarcs 7.32. I ran 200 games with >tablebases and 200 games without tablebases for Hiarcs 7.32. All games vs Chess >Tiger 12.0e. Hiarcs 7.32 ran on a PII-333 with 16 M for hash tables. Chess >Tiger ran on a K6-3-450 with 8 M for hash tables. All games were game/5 >minutes. The results were that without tablebases Chess Tiger showed a 75 point >advantage over Hiarcs 7.32 using the hardware mentioned. With no change in >Hardware but Hiarcs 7.32 using the 4 Gig of tablebases available, Chess Tiger's >advantage dropped to 35 points(200 games). This leaves a net improvement of >about 40 points for the tablebases. I also want to mention that the hardware >advantage appears to be about 35-40 points and that would make Hiarcs 7.32 and >Chess Tiger 12.0e about even at G/5 min with Hiarcs 7.32 using tablebases. Of >course only 400 games is not enough to be very accurate but it is enough to get >a rough idea under the circumstances mentioned. I would very much like to know >of other test done by anyone in this area. If you know of any please point me >to the info/site. >Jim Walker Excellent test. But wouldn't tablebases increase a program's rating much more at short time controls than at long? At longer time controls a program would have the time to calculate endgame wins without tablebases - even if not the most efficient lines, while at short time controls it may not.
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