Also,
Wikipedia- https://en.wikipedia.org/wiki/Elo_rating_system
The Elo rating system is a method for calculating the relative skill levels of players in zero-sum games such as chess. It is named after its creator Arpad Elo, a Hungarian-American physics professor.
The Elo system was invented as an improved chess-rating system over the previously used Harkness system,[1] but is also used as a rating system in association football, American football, baseball, basketball, pool, table tennis, various board games and esports, and most recently large language models.
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Never knew till today Elo is used for other than chess.
Also my rating on lichess is 1700 but my rating on chess.com is 1100 I went to play with my friends on a match I lost four games of six games I really think Lichess rating is so high because If you just win 2 match you will be 1700 but on chess.com it’s fair and better to get you only 100 rating on your first win. chess.com really show your a beginner or a advanced player
chesscom uses the elo rating system while lichess uses the glicko-2 rating system they are Different rating systems so the ratings will be Different
Incorrect- chesscom uses the elo rating system while lichess uses the glicko-2 rating system they are Different rating systems so the ratings will be Different
Chess.com Support - //support.chess.com/article/210-how-do-ratings-work-on-chess-com#
Chess.com uses the Glicko rating system, and part of this system is a number called a ‘rating deviation’ or RD, which measures how sure we are of what your rating is. If you've never played any games on Chess.com before, the system has no idea of what your 'real' rating is, so it will move your rating up and down a lot during the first few games you play.
If you aren't new, but haven't played any games for a while, your RD will also go up, and the next game you play might change your rating by a lot.
This is because Chess.com hasn’t seen any games from you in a while, and there is no way to tell whether you’ve been practicing and getting better other places, or if you haven’t been playing at all.