This page explains how Karl Mikesell (USATT# 54298)'s rating went from 1615 to 1557 at the Schaumburg Fall Open held on - 15 Sep 2007. 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.