Changping Duan
USATT#: 49379
| Coach Level: State | Certified Umpire
2224 2203
Maryland Circuit
- 16 Jun 1996
- 16 Jun 1996
This page explains how Changping Duan (USATT# 49379)'s rating went from 2224 to 2203 at the Maryland Circuit held on - 16 Jun 1996. 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.