This page explains how Harriet Quon (USATT# 2132)'s rating went from 1310 to 1289 at the Long Beach Table Tennis League event from 10 Sep 2015. 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.