This page explains how Robert Spitzer (USATT# 27003)'s rating went from 1643 to 1615 at the NJTTC 2010 November Open held on - 14 Nov 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.