This page explains how Greg John Kerkow (USATT# 41837)'s rating went from 2012 to 2008 at the Minnesota Saturday Open event from 25 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.