This page explains how Andrew Brannick (USATT# 218488)'s rating went from 1139 to 1138 at the AZ PTTC Monday event from 8 Nov 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.