This page explains how Ming-hong Chang (USATT# 48009)'s rating went from 1840 to 1830 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.