This page explains how Edwin Yau (USATT# 202653)'s rating went from 1391 to 1368 at the Mastiff Table Tennis Club event from 21 Sep 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.