This page explains how Glenn Wambold (USATT# 12851)'s rating went from 878 to 876 at the AZ PTTC Monday event from 13 Sep 2021. 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.