This page explains how Soren Tannehill (USATT# 54553)'s rating went from 1976 to 1991 at the 2021 US National TT Championships Ohio State Qualifier held on 6 Mar 2021 - 3 Apr 2021. 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.