Changping Duan
USATT#: 49379
| Coach Level: State | Certified Umpire
2120 2119
US Nationals
- 19 Dec 1999
- 19 Dec 1999
This page explains how Changping Duan (USATT# 49379)'s rating went from 2120 to 2119 at the US Nationals held on - 19 Dec 1999. 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.