This page explains how Philippe Dassonval (USATT# 60396)'s rating went from 2172 to 2159 at the Greater Hartford May 2011 Open held on - 22 May 2011. 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.