This page explains how Bob O'Rourke (USATT# 73165)'s rating went from 791 to 768 at the RI 2010 Spring Open held on - 21 Mar 2010. 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.