Changping Duan
USATT#: 49379
| Coach Level: State | Certified Umpire
2122 2089
2012 JOOLA N. American Teams O
- 25 Nov 2012
- 25 Nov 2012
This page explains how Changping Duan (USATT# 49379)'s rating went from 2122 to 2089 at the 2012 JOOLA N. American Teams O held on - 25 Nov 2012. 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.