This page explains how Hongxuan Zhu (USATT# 218441)'s rating went from 2006 to 1978 at the LYTTC Friday Pro League event from 3 Feb 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.