This page explains how Uko Marcus (USATT# 3701)'s rating went from 1842 to 1802 at the 13th Annual Decatur Open held on - 21 Aug 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.