This page explains how Glenn Wambold (USATT# 12851)'s rating went from 898 to 874 at the AZ PTTC Monday event from 27 Aug 2014. 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.