This page explains how Joe Grandalski (USATT# 45745)'s rating went from 1610 to 1586 at the 1997 Millcreek Open held on - 19 Oct 1997. 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.