This page explains how Davina Isenberg (USATT# 264091)'s rating went from 1063 to 1058 at the AZ PTTC Monday event from 13 May 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.