This page explains how Bruce Holck (USATT# 6732)'s rating went from 1689 to 1628 at the 2009 Millcreek Open held on - 25 Oct 2009. 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.