This page explains how T.C. Chang (USATT# 1175432)'s rating went from 1137 to 1121 at the GLTTC FRIDAY 730pm League event from 6 Oct 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.