This page explains how Robert Sun (USATT# 92671)'s rating went from 2189 to 2191 at the Spttc Saturday Night League event from 14 Sep 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.