This page explains how Tong Chan (USATT# 1175495)'s rating went from 1629 to 1620 at the LATTA Hong Shih Butterfly Open held on 17 Jun 2023 - 18 Jun 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.