This page explains how Paul Pan (USATT# 64221)'s rating went from 1863 to 1821 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.