This page explains how Fred L. Grimsrud (USATT# 37476)'s rating went from 1721 to 1739 at the Arizona Valley of the Sun Open held on - 3 Dec 1995. 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.