This page explains how William Stewart (USATT# 75322)'s rating went from 829 to 825 at the 2009 Millcreek Open held on - 25 Oct 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.