This page explains how Qiuyi Jia (USATT# 263263)'s rating went from 1247 to 1230 at the Spttc Saturday Night League event from 8 May 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.