This page explains how Qiuyi Jia (USATT# 263263)'s rating went from 1347 to 1247 at the Spttc Saturday Night League event from 10 Apr 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.