This page explains how John B. Allen (USATT# 3836)'s rating went from 2139 to 2133 at the Kentuckiana League event from 17 Sep 2004. 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.