This page explains how Xiang Chen (USATT# 224206)'s rating went from 1186 to 1181 at the Spttc Saturday Night League event from 16 Mar 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.