This page explains how Hoang Do (USATT# 44825)'s rating went from 2159 to 2124 at the NJTTC 2011 September Open held on - 18 Sep 2011. 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.