This page explains how Dong Chen (USATT# 219637)'s rating went from 1439 to 1393 at the Spttc Saturday Night League event from 28 Oct 2017. 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.