This page explains how Rachel Ou (USATT# 96726)'s rating went from 1875 to 1855 at the Topspin Advanced League event from 21 Jun 2017. 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.