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Re:Implementing the Elo Rating System (2020) by philihp on Saturday February 13, 2021 @06:39PM (#26128136)
I wrote this library: https://www.npmjs.com/package/openskill

It's open-license, handles complex matchups (e.g. 5 vs. 3 vs. 4), comparable in predictive accuracy, and is up to 20x faster than TrueSkill. The implementation is also much simpler.

Re:Implementing the Elo Rating System (2020) by xmprt on Sunday February 14, 2021 @11:24PM (#26139068)
This is excellent. I love how simple the API is.