This page explains how Hongxuan Zhu (USATT# 218441)'s rating went from 1989 to 1967 at the NJTTC Thursday Adv League event from 19 Aug 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.