This page explains how Soren Tannehill (USATT# 54553)'s rating went from 1990 to 1965 at the 2008 Cincinnati Open held on - 25 Oct 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.