This page explains how Carolyn Arwood (USATT# 28790)'s rating went from 1083 to 1080 at the 2024 Butterfly Houston Spring Giant Round Robin held on 17 May 2024 - 18 May 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.