Sean Koster
USATT#: 212045
1694 1734
2021 Arizona State Championship
23 May 2021 - 23 May 2021
23 May 2021 - 23 May 2021
This page explains how Sean Koster (USATT# 212045)'s rating went from 1694 to 1734 at the 2021 Arizona State Championship held on 23 May 2021 - 23 May 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.