How do ratings on online chess sites (I'm active on chess.com) compare to official (FIDE or USCF) ratings? - Quora

About Online Chess Cheating

Are chess.com ratings accurate compared to FIDE? - Quora

How would your elo compare to your OTB elo? - Chess Forums - Chess .com

Are ratings the most accurate?

Chess Club, IITK Congrats to Harikrishna

What's the correlation between FIDE rating and online rating? - Chess Stack Exchange

Frequently Asked Questions (FAQ)

How do your fide and national ratings compare to your online ratings (chess. com blitz, lichess blitz etc.)? - Quora

Comparison of my USCF, FIDE, chess.com, lichess.org, freechess.org and chesstempo.org ratings : r/chess