This page explains how Robert Spitzer (USATT# 27003)'s rating went from 1681 to 1664 at the 3rd FIT Open TT Championships held on - 13 Nov 2005. 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.