This page explains how Hongxuan Zhu (USATT# 218441)'s rating went from 2011 to 1988 at the LYTTC Friday Pro League event from 18 Feb 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.