This page explains how Don Henderson (USATT# 17127)'s rating went from 1004 to 1044 at the The 2004 Cleveland Winter Open held on - 18 Jan 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.