This page explains how Ricardo Abril (USATT# 22633)'s rating went from 1861 to 1804 at the 2003 Decatur Open held on - 16 Aug 2003. 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.