This page explains how Bobby J. Petty (USATT# 9057)'s rating went from 1823 to 1825 at the Lilly Table Tennis Club event from 15 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.