This page explains how Qixuan Gu (USATT# 270630)'s rating went from 819 to 813 at the HITTA Weekly League event from 24 Jul 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.