This page explains how Dennis Norman (USATT# 81196)'s rating went from 1616 to 1690 at the 2010 Butterfly MDTTC Open held on - 24 Oct 2010. 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.