Author: Andrew Dados
Date: 08:12:16 03/18/99
Go up one level in this thread
On March 18, 1999 at 10:23:23, KarinsDad wrote:
>On March 17, 1999 at 22:21:09, Robert Hyatt wrote:
>
>>On March 17, 1999 at 17:43:21, KarinsDad wrote:
>>
>[snip]
>>>Robert,
>>>
>>>Are you saying that the servers do not decrease the ratings changes (i.e. halve
>>>them just due to the fact that a higher rated player is playing) for the higher
>>>rated players?
>>>
>>>If so, this is strange and disturbing.
>>>
>>>KarinsDad :|
>>
>>
>>No... the Elo system has a 'max change' paramater K, that seems to be set to
>>32 for most places. And that works well in that the most your rating can change
>>with any one game is 32 points. But it is proportional to the rating difference
>>between you and your opponent.
>>
>>Other servers use a smaller K (chess.net for example) as suggested by the
>>'glickman' proposal for rating calculation. If you reduce K, then you reduce
>>the maximum rating change delta. and you limit rating 'swings'...
>
>Robert,
>
>As I'm sure you are aware, the USCF modifies the K for higher rated players.
>
>For players 2100-2399, the change is multiplied by 0.75.
>For players 2400+ , the change is multiplied by 0.5.
>
>It would seem logical for the chess servers to do something similar since you do
>want some more major level of stability at the higher ratings than you need at
>the lower ratings.
>
>Do any of the servers publish their K values and potential modifications to it?
>
>Thanks,
>
>KarinsDad :)
Go to fics and type 'help glicko' for highly detailed explanation how K is
obtained there...
does it make practical sense - that's a different story...
-Andrew-
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