This page explains how Nabil Shehadeh (USATT# 65534)'s rating went from 1675 to 1662 at the Chicago Slam TTC Open held on - 18 Oct 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.