This page explains how Jackie Feng (USATT# 70467)'s rating went from 2135 to 2121 at the LYTTC Friday Pro League event from 8 Sep 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.