This page explains how Rafi Hosein (USATT# 17893)'s rating went from 1679 to 1655 at the Westchester 2016 September Open held on 24 Sep 2016 - 25 Sep 2016. 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.