This page explains how Philippe Dassonval (USATT# 60396)'s rating went from 2170 to 2149 at the Westchester 2014 December Open held on - 28 Dec 2014. 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.