This page explains how Qiuyi Jia (USATT# 263263)'s rating went from 1074 to 1048 at the Spttc Wednesday night league event from 20 Nov 2019. 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.