The ICC [International Cricket Council] rating is based on the number of winning/losing bets a system has had during the day. If there is only one selection during the day, the One-Day International formula applies (go to www.icc-cricket.com/icc/odi/rules.html for details); if two or more selections during the day, the Test formula applies (go to www.icc-cricket.com/icc/test/rules.html for details).

The USCF [United States Chess Federation] rating takes into account the number of selections, the actual number of winners and the expected number of winners during the day. The standard formula is used. For details, go to http://math.bu.edu/people/mg/ratings/approx/approx.html. (BU stands for Boston University.)