This page explains how Aleksandr Zubarev (USATT# 221354)'s rating went from 1889 to 1913 at the Westchester August 2019 Open held on 24 Aug 2019 - 25 Aug 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.