This page explains how Greg John Kerkow (USATT# 41837)'s rating went from 1839 to 1836 at the Minnesota Saturday Open event from 23 Feb 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.