This page explains how Chebu Herrick (USATT# 74421)'s rating went from 519 to 434 at the Bay Area Butterfly Championship (Stanford) held on 15 Jun 2024 - 15 Jun 2024. 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.