| Certified Umpire
28 May 2021 - 30 May 2021
This page explains how Harrison Ngo (USATT# 89471)'s rating went from 1983 to 1961 at the 56th RoboPong St. Joseph Valley Open held on 28 May 2021 - 30 May 2021. The links below take you to pages that describe various aspects of the ratings processor.
The ratings 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.