This page explains how Isabella Joy Xu (USATT# 98155)'s rating went from 1804 to 1799 at the Sacramento National Ranking Tournament held on 29 Sep 2018 - 30 Sep 2018. 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.