Donald B. Hayes
USATT#: 50664
| Coach Level: Club | Certified Umpire
2018 1989
Boston TTC
18 Oct 2016
18 Oct 2016
This page explains how Donald B. Hayes (USATT# 50664)'s rating went from 2018 to 1989 at the Boston TTC event from 18 Oct 2016. 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.