This page explains how Glenn Wambold (USATT# 12851)'s rating went from 929 to 921 at the AZ PTTC Wednesday event from 19 Apr 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.