This page explains how Ed Watkins (USATT# 89661)'s rating went from 830 to 766 at the Mohawk Valley TTC League event from 8 Oct 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.