If you're talking about chess.com ratings versus OTB (over the board) ratings, the difference varies between 200 and 300 ratings points. Even facing a player with the same rating here on chess.com doesn't guarantee your opponent is of the same strength. A player's ratings can jump up due to opponent resignations and games lost on time.
Chess.com rating system...!!!
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I think the live game rating might be closely related to otb rating than the correspondence rating.
I was wondering how close do the ratings on chess.com(correspondence) corelate with the ratings of players...???
If i have 1600 rating here on chess.com(correspondence)...am i a player of the same calibre or are these ratings more...???