This page explains how Guo Hui Lu (USATT# 23538)'s rating went from 2399 to 2358 at the 2023 USATT Pacific Regional Championships held on 19 May 2023 - 20 May 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.