This page explains how Yifan Guo (USATT# 273603)'s rating went from 1334 to 1299 at the 888 League event from 16 Oct 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.