This page explains how Roger Paul Haidvogel (USATT# 6361)'s rating went from 1783 to 1693 at the 2011 Rochester NY Open held on - 27 Feb 2011. 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.