This page explains how Robert Spitzer (USATT# 27003)'s rating went from 1687 to 1642 at the NJTTC 2013 August Open held on - 4 Aug 2013. 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.