Donald B. Hayes
USATT#: 50664
| Coach Level: Club | Certified Umpire
2138 2119
Boston TTC
24 Sep 2019
24 Sep 2019
This page explains how Donald B. Hayes (USATT# 50664)'s rating went from 2138 to 2119 at the Boston TTC event from 24 Sep 2019. 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.