This page explains how Michael Chang (USATT# 81279)'s rating went from 1291 to 1591 at the Wing Hop Fung Washington Cup Open held on - 28 Apr 2013. 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.