This page explains how John F. Mcfadden (USATT# 29798)'s rating went from 1590 to 1507 at the Westchester 2012 July Open held on - 22 Jul 2012. 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.