This page explains how Ed Watkins (USATT# 89661)'s rating went from 1237 to 1239 at the Mohawk Valley TTC League event from 13 Apr 2015. 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.