Changping Duan
USATT#: 49379
| Coach Level: State | Certified Umpire
2215 2197
USATT Nationals Championships
- 20 Dec 2008
- 20 Dec 2008
This page explains how Changping Duan (USATT# 49379)'s rating went from 2215 to 2197 at the USATT Nationals Championships held on - 20 Dec 2008. 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.