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won a game, lost rating points!!!

won a game, lost rating points!!!

Only Chess

J

Joined
12 Sep 07
Moves
2067
Clock
24 Sep 07
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Game 4043105

My rating prior this game was 1630, my opponent's 1295.

I won the game.

My rating after the game is 1618, my opponent's 1307.

Maybe I'm missing something but that looks like a bug to me....

MR

Joined
19 Jun 06
Moves
847
Clock
24 Sep 07
1 edit
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Originally posted by Joan34
Game 4043105

My rating prior this game was 1630, my opponent's 1295.

I won the game.

My rating after the game is 1618, my opponent's 1307.

Maybe I'm missing something but that looks like a bug to me....
Try losing, maybe you'll gain rating points! 😉


Edit - OK, I had my fun. Please read the FAQ, the answer's there.

davaniel
1.Nf3

The Hague

Joined
13 Feb 05
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82376
Clock
24 Sep 07
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While you have a provisional rating, your rating might go down if you win against a lower rated opponent. After 20 games, when your rating should have straightened out in a way, this won't happen anymore.

DF
Lord of all beasts

searching for truth

Joined
06 Jun 06
Moves
30390
Clock
24 Sep 07
1 edit
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Originally posted by Joan34
Game 4043105

My rating prior this game was 1630, my opponent's 1295.

I won the game.

My rating after the game is 1618, my opponent's 1307.

Maybe I'm missing something but that looks like a bug to me....
For your 1st 20 games your rating is worked out based on the average rating of the players you have met so far so if your average opponent is say 1800 after 8 games and you have a 75% score your rating might be p2000.

Now you win your 9th game against a 1200 player making the average rating of your opponents 1733 for a 77.77% score but because the average rating of your opponents is lower your rating is now only p1950 (note that before you won you were 200 points above the average grade of your opponents and now you are 216 points above it so your rating has shown an increase against your average opponent.

Please note these % and ratings are given as approximate examples only to show how it works. Actual grades may be somewhat different

J

Joined
12 Sep 07
Moves
2067
Clock
24 Sep 07
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Interesting, thanks a bunch for the info, especially to DragonFire, I didn't know that. Even more interesting that the losing side, even if not provisional, gains point from a loss... (good for him, I'm certainly not complaining for that!)

Oh well, now that I have a better idea of what my rating on this site is I'll find player of similar strength. I have only one game with a big rating difference left, I guess that will be another drop...

Thanks again

Peakite
Sais

Berks.

Joined
27 Nov 04
Moves
41991
Clock
24 Sep 07
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He's a provisional too. Your rating can't go up with a defeat after those first 20 games.

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