This page explains how Meng Chen (USATT# 279613)'s rating went from 312 to 303 at the 2023 ICC JOOLA Winter Open held on 2 Dec 2023 - 3 Dec 2023. 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.