This page explains how Utako Kase (USATT# 223100)'s rating went from 1621 to 1616 at the Spttc Saturday Night League event from 20 Nov 2021. The links below take you to pages that describe various aspects of the ratings processor.

The ratings 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.