This page explains how Yuwen Li (USATT# 220183)'s rating went from 1993 to 1944 at the PPC 2022 Winter Open held on 10 Dec 2022 - 11 Dec 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.