Donald B. Hayes
USATT#: 50664
| Coach Level: Club | Certified Umpire
2139 2117
Boston TTC
16 Oct 2018
16 Oct 2018
This page explains how Donald B. Hayes (USATT# 50664)'s rating went from 2139 to 2117 at the Boston TTC event from 16 Oct 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.