This page explains how Mario Lorenc (USATT# 51434)'s rating went from 1877 to 1851 at the AZ PTTC Monday event from 18 Oct 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.