Robin Lock <[log in to unmask]> writes : So I got to thinking... If my son's Mite team suddenly moved to Division I (ignoring Prop 48 considerations for 8 year olds who haven't taken SAT's yet) and played an ambititious schedule consisting only of games with Maine - and losing each by a bazillion to zip. Would their RPICH rating be win% x 0.25 + opp% x 0.50 + oppopp% x 0.25 0% x 0.25 + .8600 x 0.50 + 0.5055 x 0.25 = 0.5564 ? You forgot to figure the fact that oppopp% of maine would have to drop sharply from 0.5055 due to playing a team with 0 win%. This method will work better when: 1. a large number of games is played. 2. every team plays a large number of teams, including inter-league play. eli