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wedrifid comments on The Curve of Capability - Less Wrong
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The ELO rating scheme is calculated on a logistic curve - and so includes an exponent - see details here. It gets harder to climb up the ratings the higher you get.
It's the same with traditional go kyu/dan ratings - 9 kyu to 8 kyu is easy, 8 dan to 9 dan is very difficult.
Does this suggest anything except that the scale mostly useless at the top end?
The idea in the post was:
My observation is that ELO ratings are calculated on a logistic curve - and so contain a "hidden" exponent - so the "constant rating improvement" should be taken with a pinch of salt.