This page explains how Trent Northrop (USATT# 267446)'s rating went from 1381 to 1351 at the AZ PTTC Monday event from 3 Jan 2022. 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.