This page explains how Royston Dsouza (USATT# 218904)'s rating went from 1869 to 1860 at the 2019 Arizona Sizzler Open held on 27 Jul 2019 - 28 Jul 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.