This page explains how Mark J. Ratner (USATT# 58147)'s rating went from 1766 to 1754 at the Potomac Millennium Open held on - 19 Nov 2000. 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.