This page explains how Edward Zhang (USATT# 1172446)'s rating went from 1216 to 1239 at the 2022 Butterfly September Tournament held on 18 Sep 2022 - 18 Sep 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.