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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.
Chess rating system
by jokicin a few minutes ago
Beautiful games resulting from unsound openings.
by Ultraman81 7 minutes ago
by kenardi 14 minutes ago
5/24/2015 - Too Many Threats, Not Enough Solutions
by damongross 15 minutes ago
Exploiting a lead in development?
by Mal_Smith 25 minutes ago
So I've beated the so called Impossible bot ...
by EliranCohen1991 32 minutes ago
What to do/think when opponent is thinking?
by CoolRandomStar 36 minutes ago
Find the best move
by VibrantMoves 62 minutes ago
Reproduction and Real Jaques of London Chess Set
by aristotele1 99 minutes ago
one move chess could do without
by Alessandro170 102 minutes ago
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