This page explains how Royston Dsouza (USATT# 218904)'s rating went from 1922 to 1913 at the 2021 Arizona Sizzler Open held on 31 Jul 2021 - 1 Aug 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.