This page explains how Chao Xu (USATT# 223847)'s rating went from 1621 to 1612 at the ICC - Advanced League event from 1 Jun 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.