Donald B. Hayes
USATT#: 50664
| Coach Level: Club | Certified Umpire
2025 2035
Waltham May Open RR
- 1 Jun 1997
- 1 Jun 1997
This page explains how Donald B. Hayes (USATT# 50664)'s rating went from 2025 to 2035 at the Waltham May Open RR held on - 1 Jun 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.