Rating calculation algorithm update

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Thibault de Vassal    (2007-04-06)
Rating calculation (algorithm update)

A small (but necessary) improvement in rating calculation algorithm for chess & Go : "In case of a loss or draw against a player rated more than 350 points less, the opponent's rating considered in calculation is : Current Rating - 350"


In example, if a player rated 2000 loses to a player - most probably a new player helped by a strong engine - rated 1400, the rating considered in calculation will be 1650. It should help to keep ratings more coherent.

All chess results since March 1st will be affected by this change. Next rating calculation will occur on May 1st.

You can see your future chess rating (calculated on the basis of your results since last rating calculation) by clicking on the magnifying glass in "Preferences", then "ELO".

Wayne Lowrance    (2007-04-10 20:48:29)
Rating calculation (algorithm update)

I think I will never understand FICS rating system. I gave up long, long time ago. Now it is changed again I guess. No matter, it is what it is. :) Thibault I will play, you and your server rate em.. heheheh Wayne

Thibault de Vassal    (2007-04-10 21:24:09)
Rating calculation (algorithm update)

:) ... the same about FICS / FICGS, obviously ;)

It was a minor change that affects a few unlikely results and actually everyone will benefit (if you meet ie. a new player with a low provisional rating) from that change. The aim is to make the ratings most coherent only.





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