This page explains how Xiang Chen (USATT# 224206)'s rating went from 1328 to 1321 at the Spttc Saturday Night League event from 4 Aug 2018. 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.