This page explains how Claude Boulard (USATT# 197)'s rating went from 1705 to 1671 at the New Hampshire RR Open held on - 13 Feb 2005. 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.