This page explains how Qinghua Si (USATT# 211961)'s rating went from 1672 to 1651 at the RCTTC 2024 Groundhog Round Robin held on 9 Mar 2024 - 9 Mar 2024. 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.