Donald B. Hayes
USATT#: 50664
| Coach Level: Club | Certified Umpire
2067 2060
Boston TTC
17 Mar 2015
17 Mar 2015
This page explains how Donald B. Hayes (USATT# 50664)'s rating went from 2067 to 2060 at the Boston TTC event from 17 Mar 2015. 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.