This page explains how Umar Brown (USATT# 83534)'s rating went from 980 to 980 at the Bumpernets Winter '09 T.T. Doubles League event from 2 Feb 2009. 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.