Mistake in ELO calculation


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Michel van der Kemp    (2009-08-25)
Mistake in ELO calculation?

I got this email from an advanced match.

Game 27857

[Site "FICGS"]
[Date "2009.8.23"]
[Round "1"]
[White "van der Kemp,Michel"]
[Black "Gorek,Gregor"]
[Result "1-0"]
[WhiteElo "1966"]
[BlackElo "1623"]

1.e4 g6 2.d4 Bg7 3.Nc3 d6 4.Nf3 Nf6 5.Be2 O-O 6.O-O c6 7.a4 a5 8.h3 Na6 9.Be3 Nb4 10.Qd2 Qc7 11.Rac1 Rd8 12.Rfe1 d5 13.exd5 Nbxd5 14.Nxd5 Nxd5 15.Bh6 Be6 16.Bxg7 Kxg7 17.c4 Nb4 18.Bd3 Nxd3 19.Qxd3 Qd6 20.Re3 Rd7 21.Qe2 Re8 22.Rd1 R7d8 23.Re1 Rd7 24.b3 b6 25.Ng5 Bf5 26.g4 1-0

Move sent : 2009.8.23 - 17:54:11
Move replied : 2009.8.23 - 19:10:44

Player resigned.

WhiteELO : 1966 ... 1961
BlackELO : 1623 ... 1627

This email was generated automatically by http://www.ficgs.com/
My rating went down after winning a game :)

Thibault de Vassal    (2009-08-25 23:54:19)
ELO calculation for bullet games

Hi Michel, that may be a rare case... I'll check the rules tonight and correct the algorithm.

Thanks for your message !

Daniel Parmet    (2009-08-26 05:51:01)
another rating problem.

I don't think my most recent win is being calculated in my future rating ? It says it only has 2 games for the future rating when it should have 3.

Don Groves    (2009-08-26 07:49:38)
another rating problem

Was that third game rated? You seem to have played a lot of unrated games.

Thibault de Vassal    (2009-08-26 16:54:38)
rating calculation

Hi Daniel. All games are not taken in account in the rating calculation, which result are you talking about ?

Garvin Gray    (2009-08-26 17:07:38)
do better next time :)

wow, it really is a tough place round here. You even lose points for winning a game.

Michel, I think what Thibault is telling from your rating 'dip' is that the server was not impressed by your win and expects a lot better from you next time lol :P

Thibault de Vassal    (2009-08-26 19:24:09)
do better next time :)

lol Garvin ! no he was probably right (because of the small advantage given to black), I corrected the advanced chess rating rules already.

Daniel Parmet    (2009-08-27 00:31:08)
game in question.

I'm talking about Me vs Sandor Porkolab. The game finished on Sun. It is a rated game.

Thibault de Vassal    (2009-08-27 01:58:03)
Parmet - Porkolab

The result has been recorded but here is the explanation : "The rating calculation does not take account of wins obtained by a stronger player when the Elo difference is superior to 350 points, the same with losses by a weaker player."

Daniel Parmet    (2009-08-27 06:50:46)
ah okay

well I wasn't so much talking about gaining rating points as the fact it said it was only taking into consideration 2 rated games when it should have 3.