This page explains how Bruce Downs (USATT# 118113)'s rating went from 1275 to 1221 at the Gwinnett Table Tennis Club event from 15 Aug 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.