This page explains how Claude Boulard (USATT# 197)'s rating went from 1817 to 1812 at the 2007 Gate City Open held on - 11 Mar 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.