This page explains how Sam Burns (USATT# 214932)'s rating went from 1489 to 1420 at the 15th Si & Patty Wasserman Jr. Open Table Tennis Championships held on 5 Nov 2021 - 7 Nov 2021. 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.