Gregg Robertshaw
USATT#: 9501
| Coach Level: State | Certified Umpire
2023 1999
2021 Butterfly 2-Person Teams Round Robin Tournament
14 Aug 2021 - 15 Aug 2021
14 Aug 2021 - 15 Aug 2021
This page explains how Gregg Robertshaw (USATT# 9501)'s rating went from 2023 to 1999 at the 2021 Butterfly 2-Person Teams Round Robin Tournament held on 14 Aug 2021 - 15 Aug 2021. 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.