This page explains how Robert G. Hagerstrand (USATT# 59550)'s rating went from 1109 to 1087 at the Schaumburg Open held on - 6 Nov 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.