This page explains how Paul Edward Hadfield (USATT# 6347)'s rating went from 1801 to 1809 at the AITTA 2004-2005 event from 14 Nov 2004. 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.