This page explains how Yi Gu (USATT# 54085)'s rating went from 2042 to 2028 at the LYTTC Friday Pro League event from 23 Sep 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.