This page explains how JIM TARKOWSKI (USATT# 10476)'s rating went from 1897 to 1889 at the AZ PTTC Monday event from 8 Jul 2019. 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.