This page explains how David B Novikoff (USATT# 28614)'s rating went from 1493 to 1491 at the Arizona Open held on - 12 Feb 2012. 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.