This page explains how Charlie Zhao (USATT# 272395)'s rating went from 1181 to 1157 at the 2023 CTTC June Upside-Down held on 10 Jun 2023 - 11 Jun 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.