#### Help Forum

1. 29 Jun '13 07:56
Could anyone tell me where to find out how the ratings are calculated, points awarded, etc.
2. 29 Jun '13 10:33
Try FAQ
3.  Kewpie
chess dummy
29 Jun '13 12:56
There's a useful rating chart in Thread 80000 as well.
4.  RevRSleeker
CerebrallyChallenged
29 Jun '13 22:52
Originally posted by Kewpie
There's a useful rating chart in Thread 80000 as well.
I remember when the chap listed below disappeared a few of us wondered why ( I'm in same clan ), his ratings obviously plummeted given the astronomical rate he'd attained...he had hundreds of games ongoing and I note that your game with him was one of the first to time out, hence the full 12-1300 points difference would 'supposedly' be observed when making any calculation.
The crux; you were robbed of a few points lol !!
Game 9885561
5.  Kewpie
chess dummy
30 Jun '13 00:35 / 1 edit
He was rated 2316 when I timed him out, so I got the maximum possible 32 points for the win. And of course I lost zero points in the other game where he naturally demolished me!
6.  RevRSleeker
CerebrallyChallenged
30 Jun '13 01:27
Originally posted by Kewpie
He was rated 2316 when I timed him out, so I got the maximum possible 32 points for the win. And of course I lost zero points in the other game where he naturally demolished me!
lol...as you say it should certainly have been 32, but the graph does indicate 2316 down to 2292 after your game...he lost 24pts. Perhaps I'm missing something, other than the maths
7.  Kewpie
chess dummy
30 Jun '13 01:36 / 2 edits
I went from 1079 to 1111, according to my graph, that's 32. His graph shows a drop of 24 points, certainly, but remember that rating chart is only accurate up to 2100 or thereabouts.
8.  RevRSleeker
CerebrallyChallenged
01 Jul '13 19:05
Originally posted by Kewpie
I went from 1079 to 1111, according to my graph, that's 32. His graph shows a drop of 24 points, certainly, but remember that rating chart is only accurate up to 2100 or thereabouts.
I had no idea about the 'graph accuracy'...it just seemed somewhat odd in that he 'apparently' lost 24pts whilst you gained 32. It's got me curious as to that accuracy element, I can't find anything published as to why and how...
9. 01 Jul '13 21:45
Originally posted by RevRSleeker
I had no idea about the 'graph accuracy'...it just seemed somewhat odd in that he 'apparently' lost 24pts whilst you gained 32. It's got me curious as to that accuracy element, I can't find anything published as to why and how...
From the FAQ.
New Rating= Old Rating+K*(Score- win Expectancy)
K is a constant,32 for 0-2099, 24 for 2100-2399 and 16 for 2400 and above. In other words when you reach 2100 each game has less effect on your rating and it drops again when you reach 2400.