This page explains how Blair W. Wilson (USATT# 69613)'s rating went from 1502 to 1501 at the Gwinnett Table Tennis Club event from 17 May 2008. 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.