This page explains how Royston Dsouza (USATT# 218904)'s rating went from 1954 to 1927 at the AZ PTTC Monday event from 26 Jul 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.