This page explains how Donn S. Olsen (USATT# 8823)'s rating went from 1794 to 1809 at the 2016 NOVATTC Spring Open held on 27 Feb 2016 - 28 Feb 2016. 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.