This page explains how Maria Dalee (USATT# 230607)'s rating went from 854 to 852 at the AZ PTTC Monday event from 14 Jan 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.