This page explains how Royston Dsouza (USATT# 218904)'s rating went from 1860 to 1847 at the AZ PTTC Monday event from 31 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.