This page explains how CHI CHI CHOI (USATT# 272143)'s rating went from 1031 to 1027 at the PTTC Saturday League event from 11 Dec 2021. 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.