This page explains how Norm (Pete) McAllister (USATT# 20962)'s rating went from 883 to 864 at the Upper Valley Peak Fall Foliage held on - 9 Oct 2004. 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.