This page explains how Raymond J. Sacco (USATT# 11297)'s rating went from 1772 to 1771 at the February Open held on - 28 Feb 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.