Changping Duan
USATT#: 49379
| Coach Level: State | Certified Umpire
2101 2097
Maryland Closed State Champion
- 27 Jun 1999
- 27 Jun 1999
This page explains how Changping Duan (USATT# 49379)'s rating went from 2101 to 2097 at the Maryland Closed State Champion held on - 27 Jun 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.