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Subject: Re: How do chess federations calculate rating?

Author: Dann Corbit

Date: 11:29:04 04/11/05

Go up one level in this thread


On April 11, 2005 at 13:58:03, Uri Blass wrote:

>As far as I know the Israeli chess federation bought in the past a program to
>calculate rating based on their database.
>
>They do not have the source of the program(but only the exe file) and today
>there is a problem because they decided to change the rules but they have no
>money to pay to the person who wrote the program so the old rules of rating are
>practically used and not the new rules.
>
>Note also that I thought in the past that it may be a good idea to let everybody
>to download a file with all the data that they have about results of games but I
>understood that it is impossible because the data is only in some excel file
>together with other details that they do not want the public to know so they
>cannot give people to download the excel file.
>
>I am interested to know how other chess federations calculate rating and if you
>have some good idea that I can suggest to the israeli federation.
>
>I thought about some ideas but I prefer to hear first from other people.

This is how the USCF calculated ratings at one time (don't know if it is still
true):
ftp://cap.connx.com/pub/tournament_software/USCF.C
ftp://cap.connx.com/pub/tournament_software/USCF.H
I wrote this implementation and you can use it for any purpose you like.

This is an interesting project by Royal C. Jones to calculate Elo Ratings:
ftp://cap.connx.com/pub/tournament_software/prog10.cpp
And here is his permission to use it:
ftp://cap.connx.com/pub/tournament_software/Re Your chess rating systems.txt

Elostat is a binary to calculate Elo ratings that is popular:
http://wbec-ridderkerk.nl/html/download/other/elostat_13.zip

This is a very interesting project by Rémi Coulom:
http://remi.coulom.free.fr/Bayesian-Elo/

The FICS source code has the Glicko algorithm.
ftp://cap.connx.com/pub/chess-utils/fics.1.7.4/
ftp://cap.connx.com/pub/chess-utils/FICS.DIST/
http://sourceforge.net/projects/chesssrv/
http://sourceforge.net/projects/chessd/

Recommended reading:
http://www.ratingtheory.com/
http://www.chessmetrics.com/



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