Donald B. Hayes
USATT#: 50664
| Coach Level: Club | Certified Umpire
2142 2157
U.S. National Championships
- 16 Dec 2006
- 16 Dec 2006
This page explains how Donald B. Hayes (USATT# 50664)'s rating went from 2142 to 2157 at the U.S. National Championships held on - 16 Dec 2006. 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.