Best regards and merry Xmas in advance, Guenther. This is very wrong, and fails badly in situations where opponent's ratings are far apart. Due to mathematical reasons e. It does not only show with that kind of artificial situation, but also in real tournaments. The fundamental Elo formula can be reversed to obtain an estimation of the rating difference between two players, as a function of the average score. I will do it. Here is how I would do it. 
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Dec 12, I'll try to implement it and see if I get the same results.
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Due to mathematical reasons e. This program is freeware and may be used without restrictions for all non-commercial, i. Not s of points, but this is just for example. The matrix to the right indicates the probability in percent for every player and every rank.
It can read a file containing game records in PGN format, elostqt produce a rating list.
But in this case the complete path to the PGN-file must be given, e. I will try this and make the program available. This prediction tool may also be applied to a running tournament, where some of the games have already been played.
Please login or register. You are not connected. I asked on the CSS forum, but got no reply.
The fundamental formula of Elo theory gives the expected result E of a game as a function of the rating difference D of players.
Can anybody here elostar me? In case the rating of one participant is unknown, you can set it manually with the elo command at the level of the prediction interface. The latter allows an absolute calibration of a rating list elotsat appropriate results are available. I still have to figure out what is my best option and how to do it, but being able to see an online "How to use it" page would be nice: Bayeselo gives a small advantage to C, because it drew B while playing as black.
A big source of problems in elostat is that it assumes that many games against many opponents is equivalent to as many games against one opponent whose rating in the average of elosgat.
I forgot the details. Default values are 1, 0.
Elostat Question -
It is not necessary that the database is in the same directory than the ELOStat program. This offset leads to the situation that the Av. Loosing badly in timed games and online antonmo elodtat min ago. The PGN files should have been produced by a commercial chess program or database program.
Program that calculates rating by analyzing your games?
If you wish to get the output of the "ratings" command in a file, you may redirect its output like this: Last edited by aboghadeer on Sun Feb 13, Dec 12, 8.
But I'm not sure how available to the general public it is. This is very wrong, and fails badly in situations where opponent's ratings are far apart. Dec 12, 4. Im positive it does exist.
If you want to publish rating lists produced by ELOStat on private websites or in scientific magazines you should mention the name of the program and the version number. In the present example an Elo start value elosfat was used. A high rated player is more likely to make blunders than a low rated player looking one move at a time.
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