This page explains how Jiangshan Guo (USATT# 214856)'s rating went from 2446 to 2431 at the Westchester August 2023 Open held on 26 Aug 2023 - 27 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.