This page explains how Jining Chen (USATT# 1173341)'s rating went from 1539 to 1521 at the LYTTC Friday Pro League event from 9 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.