Changping Duan
USATT#: 49379
| Coach Level: State | Certified Umpire
2161 2122
US Open Teams Championships
- 30 Nov 1997
- 30 Nov 1997
This page explains how Changping Duan (USATT# 49379)'s rating went from 2161 to 2122 at the US Open Teams Championships held on - 30 Nov 1997. 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.