This page explains how Andrew J. Lewis (USATT# 85501)'s rating went from 1229 to 1206 at the Philly Open Tournament held on - 15 Feb 2015. 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.