This page explains how David Hsu (USATT# 1175437)'s rating went from 851 to 848 at the 2023 Joola LA Open held on 12 Aug 2023 - 13 Aug 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.