This page explains how Jonathan Ou (USATT# 73748)'s rating went from 2181 to 2139 at the Heart of Florida TT Open Fall held on - 26 Sep 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.