This page explains how Sam Xiao (USATT# 217430)'s rating went from 1448 to 1328 at the 2024 PongPlanet Butterfly Championships held on 20 Apr 2024 - 21 Apr 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.