Changping Duan
USATT#: 49379
| Coach Level: State | Certified Umpire
2178 2172
2011 US Open
- 4 Jul 2011
- 4 Jul 2011
This page explains how Changping Duan (USATT# 49379)'s rating went from 2178 to 2172 at the 2011 US Open held on - 4 Jul 2011. 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.