This page explains how Ziggy Rivkin-Fish (USATT# 1166586)'s rating went from 1570 to 1553 at the 2023 Butterfly Fall Cary Cup Tournament held on 12 Oct 2023 - 15 Oct 2023. 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.