This page explains how Ed Watkins (USATT# 89661)'s rating went from 397 to 397 at the Mohawk Valley TTC League event from 12 May 2012. 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.