This page explains how Michael Nguyen (USATT# 25342)'s rating went from 1855 to 1851 at the Meiklejohn North American Seni held on - 7 Jun 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.