This page explains how Eric Chang (USATT# 1173457)'s rating went from 1399 to 1320 at the GLTTC FRIDAY 730pm League event from 27 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.