This page explains how Estee Ackerman (USATT# 81538)'s rating went from 2030 to 2009 at the Long Island's Woodbury Table Tennis League event from 4 Feb 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.