Comparison of my USCF, FIDE, chess.com, lichess.org, freechess.org and chesstempo.org ratings : r/chess
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Why is Lichess.org so popular with online chess players? - Quora
1300+ puzzle on chesscom, 47% pass rate : r/chess
Why is Lichess.org so popular with online chess players? - Quora
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How do ratings on online chess sites (I'm active on chess.com) compare to official (FIDE or USCF) ratings? - Quora
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Why is Lichess.org so popular with online chess players? - Quora
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Rating Comparison: Lichess, Chess.com, USCF and FIDE
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