This page explains how Junjie Lin (USATT# 219794)'s rating went from 1845 to 1831 at the Spttc Saturday Night League event from 25 Jan 2020. 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.