This page explains how Ethan Jiao (USATT# 271482)'s rating went from 41 to 25 at the HITTA Weekly League event from 8 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.