This page explains how Chad Dammar (USATT# 82170)'s rating went from 1588 to 1575 at the 2013 Millcreek Open held on - 20 Oct 2013. 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.