This page explains how Timothy Allen Tonn (USATT# 43128)'s rating went from 1790 to 1774 at the 2009 Lindenwood July Open held on - 19 Jul 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.