This page explains how Yat Long Rain Cheng (USATT# 1180566)'s rating went from 1167 to 1086 at the GLTTC FRIDAY 730pm League event from 1 Dec 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.