This page explains how Tom Ruan (USATT# 14167)'s rating went from 2040 to 2029 at the 2023 ICC JOOLA Autumn Open held on 28 Oct 2023 - 29 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.