This page explains how John Kwon (USATT# 97397)'s rating went from 1620 to 1620 at the Spttc Saturday Night League event from 17 Feb 2018. 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.