Changping Duan
USATT#: 49379
| Coach Level: State | Certified Umpire
2046 2012
2016 Butterfly WDCTT December Open
10 Dec 2016 - 10 Dec 2016
10 Dec 2016 - 10 Dec 2016
This page explains how Changping Duan (USATT# 49379)'s rating went from 2046 to 2012 at the 2016 Butterfly WDCTT December Open held on 10 Dec 2016 - 10 Dec 2016. The links below take you to pages that describe various aspects of the rating processor.
Introduction
Initial Rating
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.