This page explains how Isabella Joy Xu (USATT# 98155)'s rating went from 2277 to 2189 at the 2023 JOOLA North American Teams held on 24 Nov 2023 - 26 Nov 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.