This page explains how Philippe Dassonval (USATT# 60396)'s rating went from 2193 to 2139 at the 2007 Spinnathon Open held on - 27 May 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.