Author: KarinsDad
Date: 07:23:23 03/18/99
Go up one level in this thread
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 :)
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