Author: Chris Carson
Date: 03:04:42 01/28/00
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On January 27, 2000 at 23:12:50, Dann Corbit wrote: >What exactly were the two columns of information used for the calculation, and >how were they arrived at? Ply is the x-axis and SSDF Rating is the Y-axis. Ply and SSDF are used for the Correlation Coef (R), Standard Error of Measure (SEM), ect... Note: If Rex Chess is used for the 386/16MHZ (SSDF #1, with rating of 1930), then, R=.9899, SEM=41.4206, Slope=255.8808, and Y-intercept=35.9833. This also gives a sample size of 7 instead of 6. If you add the ELH #1 on a Pp200 (Fritz 6a, 2633), then, R=.9913, SEM=33.0830, Slope=257.3650, Y-Int=23.8467 and sample size will be 8 data points. Interesting that in the last run, the Slope (points from 6x or 1 ply increase is close to the Monty Newborn estimate). Note also that NPS and Ply are estimates, I could re-calibrate using just specint95, thus no spurious data would be present. The main problem is the small sample size. I can accept this given that it is only the #1 programs/Hw that we have. The sample size can be increased by using the top 3 to 5 program instead of the top 1, thus giveing a sample size of 24 or 40 (but showing what the average increase would be and not the best). I can do that calculation if you like. :) I can also repeat this for the Computer vs Human results we have. This might take a little time, so let me know which calculations (if any) you would like. I will be out some today attending an afternoon seminar. I am using EXCEL for the actual calculations. :) SSDF: http://home3.swipnet.se/~w-36794/ssdf/ ELH: http://www.elhchess.demon.co.uk/ehss.htm Best Regards, Chris Carson
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