This page explains how Utako Kase (USATT# 223100)'s rating went from 1666 to 1581 at the Spttc Saturday Night League event from 3 Nov 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.