This page explains how Jason Lacey (USATT# 9257)'s rating went from 1746 to 1721 at the The Macy Block Open held on - 20 May 2007. 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.