The USCF classifies players according to their rating ( Just & Burg 2003 : 259 -- 73 ) .
The USCF uses a modification of the Elo system , where the K factor varies and there are bonus points for superior performance in a tournament .
The USCF classifies players according to USCF 's rating ( Just & Burg 2003 : 259 -- 73 ) .
The USCF uses a modification of the Elo system , where the K factor varies and there are bonus points for superior performance in a tournament .