This page explains how David Aaron Katz (USATT# 1291)'s rating went from 1675 to 1673 at the 2010 NYC Mayor's Cup held on - 8 May 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.