This page explains how Philippe Dassonval (USATT# 60396)'s rating went from 2190 to 2271 at the Butterfly MDTTC October Open held on - 18 Oct 2009. 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.