This page explains how Jackie Feng (USATT# 70467)'s rating went from 2043 to 2040 at the LYTTC TTcup event from 22 Apr 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.