This page explains how Brian Bartley (USATT# 54303)'s rating went from 1909 to 2009 at the Indiana State Championships 2021 held on 1 May 2021 - 2 May 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.