This page explains how Derek Nie (USATT# 77564)'s rating went from 2011 to 2005 at the MDTTC Saturday League event from 19 Feb 2012. 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.