Donald B. Hayes
USATT#: 50664
| Coach Level: Club | Certified Umpire
2178 2138
Boston TTC
17 Sep 2019
17 Sep 2019
This page explains how Donald B. Hayes (USATT# 50664)'s rating went from 2178 to 2138 at the Boston TTC event from 17 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.