This page explains how Jonathan Paretsky (USATT# 63684)'s rating went from 1691 to 1665 at the Hutchinson 2004 Winter Open held on - 7 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.