This page explains how Hyun Ook Ryu (USATT# 88326)'s rating went from 1776 to 1771 at the Spttc Saturday Night League event from 4 May 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.