This page explains how Yifan Guo (USATT# 273603)'s rating went from 1199 to 1199 at the 888 League event from 12 Jun 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.