This page explains how Richard Lee (USATT# 54845)'s rating went from 2452 to 2444 at the Club JOOLA in Rockville League event from 5 Oct 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.