Donn S. Olsen
USATT#: 8823
1880 1873
Westchester April 2021 Little Open
24 Apr 2021 - 25 Apr 2021
24 Apr 2021 - 25 Apr 2021
This page explains how Donn S. Olsen (USATT# 8823)'s rating went from 1880 to 1873 at the Westchester April 2021 Little Open held on 24 Apr 2021 - 25 Apr 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.