This page explains how Haihong Zhu (USATT# 274612)'s rating went from 1680 to 1664 at the NJTTC Thursday Adv League event from 27 Oct 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.