This page explains how Dana B. Hanson (USATT# 6421)'s rating went from 1590 to 1583 at the 2013 Virginia Joola Open held on - 5 Oct 2013. 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.