This page explains how Marek Ignatowski (USATT# 82904)'s rating went from 1672 to 1652 at the Labor Day Open held on - 4 Sep 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.