This page explains how Bill Lum (USATT# 55787)'s rating went from 1639 to 1562 at the 18th Annual Viducich Stiga Pac held on - 12 Nov 2006. 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.