This page explains how Robert M. Ross (USATT# 14687)'s rating went from 1663 to 1640 at the Sports Fitness Jan Series held on - 5 Feb 2000. The links below take you to pages that describe various aspects of the rating processor.

The rating processor goes through 4 passes in order. The links take you to pages that provide detailed explanations of the calculations during each of the 4 passes.