This page explains how Robert Guillot (USATT# 31353)'s rating went from 1512 to 1502 at the USM Open Giant RR held on - 13 Nov 2004. 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.