This page explains how Moustapha Nasser (USATT# 33797)'s rating went from 1689 to 1674 at the 2016 May Upside Down Open Tournament held on 21 May 2016 - 22 May 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.