This page explains how Dean Norman (USATT# 29062)'s rating went from 1555 to 1548 at the The 2009 Cleveland Winter Open held on - 1 Feb 2009. 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.