This page explains how Thomas Darrel Madigan (USATT# 7983)'s rating went from 1535 to 1515 at the 2004 Colorado Springs Open held on - 10 Oct 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.