This page explains how Hongxuan Zhu (USATT# 218441)'s rating went from 1902 to 1922 at the LYTTC Friday Pro League event from 25 Jun 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.