This page explains how Rachel Ou (USATT# 96726)'s rating went from 1988 to 1980 at the Topspin Advanced League event from 26 Jan 2019. 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.