This page explains how Michael Kolb (USATT# 277414)'s rating went from 646 to 581 at the AZ PTTC Monday event from 19 Jun 2023. 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.