Map of the average USCF rating of the top ten players in each

SCRIP: Scholarly Research In Progress 2022 by GeisingerCollege - Issuu

Map of the average USCF rating of the top ten players in each state's most recent championship/open (table in comments) : r/chess

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A few statistics from the USCF database - Chess Forums

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Chess Engine ELO accuracy > Online rating accuracy? - Chess Forums - Chess .com

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Chess: What's a Good Rating?. How good are you at Chess? What is the…, by Mackenzie Tittle

Who is the Master? - IOS Press

The Effect of Chess on Standardized Test Score Gains - David I. Poston, Kathryn K. Vandenkieboom, 2019