This page explains how George Davis (USATT# 10910)'s rating went from 1641 to 1628 at the AZ PTTC Monday event from 20 May 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.