This page explains how Junjie Lin (USATT# 219794)'s rating went from 1831 to 1850 at the Spttc Saturday Night League event from 1 Feb 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.