This page explains how Derek Nie (USATT# 77564)'s rating went from 1854 to 1793 at the MDTTC Saturday League event from 7 Nov 2010. 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.