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Subject: Undocumented command in Shredder4.

Author: Stefan Meyer-Kahlen

Date: 02:15:21 12/10/99


I have added a feature in Shredder to calculate the relative ELO performance of
a match including the error range of the result. I did this for internal use
only, but as I got positive reaction from some testers I told about it, I
decided to publish it.

Here’s how it works:
Assume A played B in a 20 games match and scored 12-8 with 9 wins, 6 draws and 5
losses.
Just enter
   “tp 9 6 5”
in Shredder4 and you’ll get
   “20 +9 =6 -5    60.0%   TP = +80 ELO   95% -> [-66,+226]”

TP means tournament performance (here +80 Elo), with a 5% error margin the
“real” ELO difference is between –66 and +226 ELO.

I hope this helps somebody
   Stefan




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