This page explains how Hongxuan Zhu (USATT# 218441)'s rating went from 1951 to 1930 at the LYTTC Friday Pro League event from 24 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.