This page explains how Derrick Cone (USATT# 64672)'s rating went from 2050 to 2048 at the AZ PTTC Monday event from 22 Aug 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.