This page explains how Amer M. Shaw (USATT# 5954)'s rating went from 1858 to 1850 at the Kentuckiana League event from 2 Sep 2009. 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.