This page explains how Jeffrey Von Kohorn (USATT# 76011)'s rating went from 1536 to 1521 at the QTTC March Open held on - 27 Mar 2011. 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.