This page explains how Jon Redman (USATT# 14969)'s rating went from 1242 to 1163 at the Tucson Open held on - 17 Aug 2008. 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.