Rating Explainer

Changping Duan

USATT#: 49379

| Coach Level: State | Certified Umpire

2117 2115

Potomac Fall Open
- 22 Nov 1998

This page explains how Changping Duan (USATT# 49379)'s rating went from 2117 to 2115 at the Potomac Fall Open held on - 22 Nov 1998. 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.

Pass 1

Pass 2

Pass 3

Pass 4