This page explains how Louis Radzeli (USATT# 42580)'s rating went from 1613 to 1569 at the 5th Annual Willoughby Hills Gi held on - 26 Sep 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.