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  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. Subscriber Kewpie
    chess dummy
    29 Jun '13 12:56
    There's a useful rating chart in Thread 80000 as well.
  4. Standard member 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. Subscriber 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. Standard member 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. Subscriber 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. Standard member 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.