This page explains how Rex Harris (USATT# 45842)'s rating went from 1663 to 1680 at the 2nd Annual North American Chal held on - 4 May 1996. 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.