This page explains how Jiangshan Guo (USATT# 214856)'s rating went from 2467 to 2459 at the 2022 Butterfly Fall Cary Cup held on 13 Oct 2022 - 16 Oct 2022. 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.