This page explains how Ark Sean Ouyang (USATT# 97418)'s rating went from 1951 to 1940 at the LYTTC Friday Pro League event from 30 Mar 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.