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The United States Chess Federation
(USCF) categorizes players by rating:
Class E, Class D, Class C, Class B, Class A.
Expert Master, Senior Master.
These performance norms are achieved in
twenty four (24) games or more within a three year period.
An
A-player has a rating between 1800 and 1999 and is among the top 17% of all tournament players. Numerical ratings are estimates of
Chess skill based on tournament results.
Rating points are awarded or subtracted for winning or losing games in recognized tournaments. More points are gained for beating stronger opponents or lost for losing to weaker ones.
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