This page explains how Jason Piech (USATT# 201854)'s rating went from 1639 to 1619 at the ARKTTA 2020 March Youth Weekend held on 7 Mar 2020 - 8 Mar 2020. The links below take you to pages that describe various aspects of the rating processor.

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.