This page explains how Shuang Yu (USATT# 220833)'s rating went from 2209 to 2221 at the Spttc Saturday Night League event from 12 Nov 2022. 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.