This page explains how Nabil Shehadeh (USATT# 65534)'s rating went from 1631 to 1596 at the Holiday Open held on - 26 Dec 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.