This page explains how Ark Sean Ouyang (USATT# 97418)'s rating went from 1941 to 1939 at the Topspin Advanced League event from 4 Aug 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.