Donald B. Hayes
USATT#: 50664
| Coach Level: Club | Certified Umpire
1996 2024
Waltham February Open RR
- 23 Feb 1997
- 23 Feb 1997
This page explains how Donald B. Hayes (USATT# 50664)'s rating went from 1996 to 2024 at the Waltham February Open RR held on - 23 Feb 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.