This page explains how Michael Raybman (USATT# 215854)'s rating went from 1216 to 1209 at the 2023 Pong Planet Butterfly Open held on 16 Sep 2023 - 17 Sep 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.