This page explains how Kai Zhang (USATT# 86637)'s rating went from 2639 to 2642 at the Westchester 2016 June Open held on 25 Jun 2016 - 26 Jun 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.