This page explains how Rodney Linn Peffer (USATT# 9004)'s rating went from 1851 to 1808 at the 2006 N. American Teams Open Ch held on - 26 Nov 2006. 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.