Hello. My question is how Elo in chess is calculated in chess and how as well as why online rating are different compared to OTB ratings.
https://lichess.org/page/rating-systems
Wow, somebody who actually means Elo when he's talking about Elo! :D
https://www.reddit.com/r/lichess/comments/mdvbkp/yet_another_lichess_vs_fide_rating_comparison/
for only sensible source of corelation
and Elo : simply wikipedia for theory
https://en.wikipedia.org/wiki/Elo_rating_system
and for specific implementation obviously fide handbook
https://handbook.fide.com/chapter/B022017
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