This page explains how Colton Sowers (USATT# 277214)'s rating went from 910 to 909 at the AZ PTTC Monday event from 30 Jan 2023. 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.