This page explains how Kodi Vonderau (USATT# 77003)'s rating went from 1644 to 1639 at the Westchester 2016 April Open held on 23 Apr 2016 - 24 Apr 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.