This page explains how Joe Pierotti (USATT# 16090)'s rating went from 1673 to 1639 at the AZ PTTC Monday event from 11 Mar 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.