This page explains how Bobby J. Petty (USATT# 9057)'s rating went from 1825 to 1750 at the Lilly Table Tennis Club event from 27 Jun 2004. 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.