This page explains how Bob O'Rourke (USATT# 73165)'s rating went from 1003 to 969 at the Maryland Circuit held on - 4 Feb 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.