This page explains how Lucia Sun (USATT# 230237)'s rating went from 1373 to 1431 at the ICC JOOLA Spring Open 2022 held on 19 Mar 2022 - 20 Mar 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.