This page explains how Dirk Roskam (USATT# 72953)'s rating went from n/a to 668 at the South Bend Open held on - 9 Dec 2006. 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.