This page explains how Mukaila Rabiu (USATT# 219391)'s rating went from 1909 to 1835 at the Westchester January 2019 Open held on 26 Jan 2019 - 27 Jan 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.