This page explains how David Marrone (USATT# 84907)'s rating went from 609 to 589 at the Infogix Aurora Open held on - 24 Jun 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.