Rating Explainer

Changping Duan

USATT#: 49379

| Coach Level: State | Certified Umpire

1993 2018

2017 Butterfly WDCTT June Open
24 Jun 2017 - 24 Jun 2017

This page explains how Changping Duan (USATT# 49379)'s rating went from 1993 to 2018 at the 2017 Butterfly WDCTT June Open held on 24 Jun 2017 - 24 Jun 2017. The links below take you to pages that describe various aspects of the ratings processor.

Introduction

Initial Rating

The ratings 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.

Pass 1

Pass 2

Pass 3

Pass 4