This page explains how Marcin Kurcz (USATT# 72817)'s rating went from 1906 to 1891 at the 2013 Aurora Fall Open held on - 6 Oct 2013. 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.