This page explains how Alton Zhao (USATT# 273085)'s rating went from 1207 to 1162 at the PTTC Saturday League event from 19 Nov 2022. 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.