This page explains how Qinghua Si (USATT# 211961)'s rating went from 1624 to 1624 at the Rose City Sanctioned League Tournament held on 31 Mar 2018 - 31 Mar 2018. 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.