This page explains how Harriet Quon (USATT# 2132)'s rating went from 1274 to 1250 at the Long Beach Table Tennis League event from 21 Jun 2017. 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.