This page explains how Dana B. Hanson (USATT# 6421)'s rating went from 1740 to 1688 at the US Nationals held on - 18 Dec 1994. 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.