This page explains how Arlan Arnsten (USATT# 271045)'s rating went from 447 to 430 at the ASLT October Open 2022 held on 21 Oct 2022 - 22 Oct 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.