This page explains how Jamo Parrish (USATT# 75310)'s rating went from 1114 to 1214 at the 2007 Washington Open held on - 1 Dec 2007. 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.