This page explains how Jinpeng Xiao (USATT# 85228)'s rating went from 1577 to 1672 at the 2021 Butterfly/Sonesta Select Invitational Tournament held on 7 Oct 2021 - 10 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.