This page explains how David L. MacGregor (USATT# 55325)'s rating went from 1376 to 1352 at the Schaumburg First Big Ball RR O held on - 28 Oct 2000. 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.