Donald B. Hayes
USATT#: 50664
| Coach Level: Club | Certified Umpire
2044 2032
US Nationals
- 21 Dec 1997
- 21 Dec 1997
This page explains how Donald B. Hayes (USATT# 50664)'s rating went from 2044 to 2032 at the US Nationals held on - 21 Dec 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.