This page explains how John Mc Dermott (USATT# 93518)'s rating went from 2040 to 2028 at the Long Island's Woodbury Table Tennis League event from 20 Aug 2016. 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.