This page explains how Alvin Chen (USATT# 89725)'s rating went from 1840 to 1817 at the 2016 USA Table Tennis National Championship held on 4 Jul 2016 - 9 Jul 2016. 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.