This page explains how Qi Cai (USATT# 223588)'s rating went from 1613 to 1593 at the Spttc Saturday Night League event from 19 Jun 2021. 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.