This page explains how Lucas Mueller (USATT# 1180876)'s rating went from 570 to 809 at the Butterfly S&S December Open held on 16 Dec 2023 - 17 Dec 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.