This page explains how John M. Denny (USATT# 63566)'s rating went from 1211 to 1211 at the Penn State December Open held on - 4 Dec 2008. 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.