This page explains how Mario Lorenc (USATT# 51434)'s rating went from 1894 to 1877 at the AZ PTTC Monday event from 13 Sep 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.