This page explains how Qi Cai (USATT# 223588)'s rating went from 1586 to 1579 at the Spttc Saturday Night League event from 1 Feb 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.