This page explains how Ryan Mahoney (USATT# 72369)'s rating went from 1501 to 1484 at the September Open held on 7 Sep 2019 - 7 Sep 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.