Author: Robert Hyatt
Date: 08:56:26 06/26/04
Go up one level in this thread
On June 26, 2004 at 05:07:49, Sune Fischer wrote: >On June 24, 2004 at 20:08:17, Vincent Diepeveen wrote: > >>Hello, >> >>Perhaps open a discussion. >> >>I played a few games at FICS now and again see the same thing. If you play much >>lower rated (say 200-700 points), then you lose points simply. If you play equal >>or higher rated then you win rating. >> >>A lot of higher rated players are non stop declining to play games at 3 0. It is >>not nice. But it does bring them points. >> >>What to do to fix this problem other than avoid certain pairings? > >It's a well known issue with the Elo system, it pridicts too high odds for the >higher rated player when the Elo difference is large. > >The higher rated player must over perform or he loses rating, so of course on >average he will lose rating against lower rated opponents. > >-S. There is another flaw. It doesn't consider the difference between a player that plays 1-2 tournaments per year and his strength can change significantly between events, and the player that plays dozens of games per day. The "glicko" system used on FICS handles this _very_ well. The more you play the more stable your rating becomes. If you become inactive and then play again, your rating can adjust signficantly for a while until it stabilizes again... It isn't a "zero-sum" deal like Elo, I can lose more or less than you gain if you beat me...
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