This page explains how Jeff Huan Cao (USATT# 76330)'s rating went from 1590 to 1580 at the NJTTC Tuesday V League event from 21 Sep 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.