This page explains how Harriet Quon (USATT# 2132)'s rating went from 1215 to 1221 at the Long Beach Table Tennis League event from 28 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.