Paul Dargan wrote:I thought that FIDE recalculated ratings for players every 30 games if they played more than this number within the same rating period?? exactly to try and prevent this kind of effect?
Paul Dargan wrote:Or did this stop when they moved to rating each game and more frequent lists?
John Upham wrote:My understanding of these calculations is poor.
For example, at the recent e2e4 Gatwick Major
A 1789 player achieves a TPR of 2719 with the following results :
He draws with the Bye
Beats a 1989
Looses to a 1489
Looses to a 1933
draws with someone with a rating of 0
Keep doing this over a few majors and...
So, clearly my understanding is badly wrong. Can someone help please?
Christopher Kreuzer wrote:...I'm actually slightly disillusioned with the way the FIDE rating system works ... there are too many under-rated players around for the system to work properly.
...
When I first talked to various people about the FIDE rating system (this was some 10 years ago, when it was much harder to get an initial rating), they all said that the initial rating you get is critical.
Jonathan Bryant wrote:I must admit I'm not sure I understand the process that FIDE use to work out initial ratings.
If you take me games from Sunningdale I scored 3.5/4 against relatively weaker opposition and apparently that gave me a TPR of 1936. At Gatwick I scored 1.5/4 against relatively stronger opposition for a TPR of 2007. Quite a difference.
Alex Holowczak wrote:You've scored 3.5/4 v 1898 and 1.5/4 v 2094. In total, that would be 5/8 v 1996. If you managed that in one tournament, you'd have a rating of 2021 over your 8 games. The way you've done it, you have part ratings of 1936 and 2007 at 4 games each, which would work out to be 1972 over 8 games. So your rating is 49 points lower than it would have been had you scored 5/8 in one tournament, rather than do it in two separate tournaments.
Alex Holowczak wrote:You've scored 3.5/4 v 1898 and 1.5/4 v 2094. In total, that would be 5/8 v 1996. If you managed that in one tournament, you'd have a rating of 2021 over your 8 games. The way you've done it, you have part ratings of 1936 and 2007 at 4 games each, which would work out to be 1972 over 8 games. So your rating is 49 points lower than it would have been had you scored 5/8 in one tournament, rather than do it in two separate tournaments.
Alex Holowczak wrote:Jonathan Bryant wrote:I must admit I'm not sure I understand the process that FIDE use to work out initial ratings.
If you take me games from Sunningdale I scored 3.5/4 against relatively weaker opposition and apparently that gave me a TPR of 1936. At Gatwick I scored 1.5/4 against relatively stronger opposition for a TPR of 2007. Quite a difference.
For your 3.5/4, your rating would be: Average Opponent Rating + 1.5*25. 1.5 is the number of points above the 50% score you are. 25 probably is a random number. Hence your rating for that event is average opponent rating + 37.5, rounded to the nearest integer.
For your 1.5/4, you scored less than 50%. 37.5%, to be precise. By looking it up in a look-up table, scoring 0.375 (rounded up to 0.38) means you get your average opponents' rating minus 87. See the table on this page.
So this is where your part ratings come from.
You've scored 3.5/4 v 1898 and 1.5/4 v 2094. In total, that would be 5/8 v 1996. If you managed that in one tournament, you'd have a rating of 2021 over your 8 games. The way you've done it, you have part ratings of 1936 and 2007 at 4 games each, which would work out to be 1972 over 8 games. So your rating is 49 points lower than it would have been had you scored 5/8 in one tournament, rather than do it in two separate tournaments.
Sean Hewitt wrote:Also, part ratings have to be achieved in units of three games or more. So playing one rated player in your next event is no use, Jonathan needs to play three.
IM Jack Rudd wrote:Alex Holowczak wrote:You've scored 3.5/4 v 1898 and 1.5/4 v 2094. In total, that would be 5/8 v 1996. If you managed that in one tournament, you'd have a rating of 2021 over your 8 games. The way you've done it, you have part ratings of 1936 and 2007 at 4 games each, which would work out to be 1972 over 8 games. So your rating is 49 points lower than it would have been had you scored 5/8 in one tournament, rather than do it in two separate tournaments.
Note to everyone reading this: this is no longer the way the system works. The way it now works does give Jonathan an effective 2021 over 8 games.
Jonathan Bryant wrote:{PS: I still think FIDE's evaluation of wins against lower rated opponents is a bit mean spirited}
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