This page explains how Gregg Robertshaw (USATT# 9501)'s rating went from 2138 to 2139 at the 2006 'Cary Cup' Championship held on - 19 Mar 2006. 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.