This page explains how Vaughan Banfield (USATT# 92240)'s rating went from 1250 to 1247 at the PingTTC event from 4 Nov 2013. 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.