This page explains how Chi-Sun Chui (USATT# 4879)'s rating went from 2381 to 2379 at the OCTTA BUTTERFLY OPEN JUNE held on 9 Jun 2024 - 9 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.