This page explains how Dave French (USATT# 20943)'s rating went from 1687 to 1669 at the 2008 Rochester New York Open held on - 24 Feb 2008. 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.