This page explains how Raymond J. Sacco (USATT# 11297)'s rating went from 1817 to 1813 at the August Open held on - 28 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.