Donald B. Hayes
USATT#: 50664
| Coach Level: Club | Certified Umpire
2158 2143
Boston TTC
9 Jan 2018
9 Jan 2018
This page explains how Donald B. Hayes (USATT# 50664)'s rating went from 2158 to 2143 at the Boston TTC event from 9 Jan 2018. 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.