This page explains how Lyonnel W. Eugene (USATT# 3422)'s rating went from 1681 to 1640 at the NJTTC December Open held on - 13 Dec 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.