This page explains how Dana B. Hanson (USATT# 6421)'s rating went from 1603 to 1544 at the 2009 NNTTC JOOLA Open held on - 19 Apr 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.