This page explains how C. Evan Oswald (USATT# 59885)'s rating went from 903 to 900 at the AZ PTTC Wednesday event from 15 Oct 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.