This page explains how Ed Watkins (USATT# 89661)'s rating went from 1239 to 1250 at the Mohawk Valley TTC League event from 27 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.