This page explains how Claude Boulard (USATT# 197)'s rating went from 1879 to 1817 at the 2007 Rhode Island Winter Class held on - 28 Jan 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.