This page explains how Qixuan Gu (USATT# 270630)'s rating went from 1137 to 1111 at the HITTA Weekly League event from 20 Jan 2024. 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.