This page explains how Jia Nuo Yu (USATT# 231601)'s rating went from 801 to 799 at the Spttc Saturday Night League event from 19 Jan 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.