This page explains how Haowei Xu (USATT# 1177767)'s rating went from 1111 to 1107 at the HITTA Weekly League event from 21 Oct 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.