This page explains how C. Evan Oswald (USATT# 59885)'s rating went from 874 to 865 at the AZ PTTC Monday event from 17 Jul 2017. 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.