This page explains how Steven Weller (USATT# 270002)'s rating went from 947 to 939 at the AZ PTTC Monday event from 28 Jun 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.