Donald B. Hayes
USATT#: 50664
| Coach Level: Club | Certified Umpire
2030 2031
Karen/Aaron Chang/Chung Double
- 1 Apr 2000
- 1 Apr 2000
This page explains how Donald B. Hayes (USATT# 50664)'s rating went from 2030 to 2031 at the Karen/Aaron Chang/Chung Double held on - 1 Apr 2000. 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.