This page explains how Willem Vandermeulen (USATT# 283319)'s rating went from 838 to 843 at the Mohawk Valley TTC League event from 9 Jul 2007. 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.