Author: Uri Blass
Date: 13:08:21 04/11/05
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On April 11, 2005 at 14:29:04, Dann Corbit wrote: >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/ Thanks for all the data. If I understand the program to calculate USCF rating is free source code by you. I still did not look at your files. The main problem as I see is getting the data and not calculating the rating based on the relevant formula. As far as I know the Israeli program simply read the data about the results from a file but I do not know at this moment details about the file and I only understood that it is a big excel file that they cannot give to download because it contain personal information. How does your program get the data? It is possible to give the program all the data manually but I think that it is not a good idea because there may be some programs to calculate rating based on the same data and if every program that calculate rating will need to get the data manually then it is a waste of work. It seems to me a better idea to have the data in some accepted format that every program that calculates rating get and there can be seperate program to collect the data and many programs to calculate rating based on the data. Uri
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