This page explains how Joel Liu (USATT# 75202)'s rating went from 1814 to 1809 at the 2009 NYTTF August Open held on - 9 Aug 2009. 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.