Changping Duan
USATT#: 49379
| Coach Level: State | Certified Umpire
2172 2152
2011 US Nationals
- 17 Dec 2011
- 17 Dec 2011
This page explains how Changping Duan (USATT# 49379)'s rating went from 2172 to 2152 at the 2011 US Nationals held on - 17 Dec 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.