This page explains how Steven Lowry (USATT# 7907)'s rating went from 2209 to 2197 at the Pottsgrove TTC event from 7 Jan 2005. 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.