Donald B. Hayes
USATT#: 50664
| Coach Level: Club | Certified Umpire
2157 2149
Boston TTC
25 Jun 2019
25 Jun 2019
This page explains how Donald B. Hayes (USATT# 50664)'s rating went from 2157 to 2149 at the Boston TTC event from 25 Jun 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.