This page explains how Hong Qin (USATT# 202009)'s rating went from 1175 to 1215 at the Huntsman World Senior Games 2021 held on 4 Oct 2021 - 7 Oct 2021. 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.