This page explains how James Petrie (USATT# 55556)'s rating went from 1528 to 1508 at the 1999 Kansas Winter Classic held on - 27 Feb 1999. 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.