This page explains how T.C. Chang (USATT# 1175432)'s rating went from 1109 to 1107 at the GLTTC FRIDAY 730pm League event from 1 Sep 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.