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1. The rating distribution of problems is multimodal. To see what I mean, go to your tactics trainer page and click on "view problems". The rating frequency distribution has detectable modes at approximately 1200 1400 1600 and 1800. If the Glicko rating adjustment algorithm assumes a normal distribution, this is a huge problem.
2. The limiting Rd values seem to have been adjusted upward. i.e. you gain more for solving a problem quickly or lose more for failing one completely. The limit Rd values for problems should be lower, say around 7 after they have been worked 1000 times. Not sure what to suggest for players.
3. The algorithm for pairing players is now biased downward. In the last 50 problems, maybe it's more like 100, I've had ONE problem higher than my TT rating.
Maybe it's time to hit the "reset" button.
Trysts is gone?! :(
by default_avatar 3 minutes ago
by Angeloclimber 3 minutes ago
honestly..the only true rival of Magnus is this man
by The_Ghostess_Lola 5 minutes ago
Ridiculous new "anti-cheating" rule for the World Open.
by owltuna 7 minutes ago
Free trophies (LIMITED TIME!)
by athota 9 minutes ago
best way to play against queens gambit.
by blueemu 11 minutes ago
If Fischer would played Karpov for the World Champion, who would win?
by trotters64 11 minutes ago
Can we protect our site from hackers?
by Billion_Tactics_Boy 11 minutes ago
King's Gambit: What Is Wrong With 5...h5?
by pfren 14 minutes ago
# of rated players worldwide ?
by woton 16 minutes ago
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