Donald B. Hayes
USATT#: 50664
| Coach Level: Club | Certified Umpire
2151 2139
Boston TTC
15 Jan 2019
15 Jan 2019
This page explains how Donald B. Hayes (USATT# 50664)'s rating went from 2151 to 2139 at the Boston TTC event from 15 Jan 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.