This page explains how Ray Arthur Sprague (USATT# 10208)'s rating went from 1618 to 1479 at the Ping TTC Giant Round Robin Winter 2013 held on - 16 Feb 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.