Donald B. Hayes
USATT#: 50664
| Coach Level: Club | Certified Umpire
2157 2122
U.S. Open Championships
- 7 Jul 2007
- 7 Jul 2007
This page explains how Donald B. Hayes (USATT# 50664)'s rating went from 2157 to 2122 at the U.S. Open Championships held on - 7 Jul 2007. 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.