This page explains how Sam Lui (USATT# 220752)'s rating went from 1067 to 1011 at the 2023 NEWARK BUTTERFLY SEPTEMBER OPEN held on 24 Sep 2023 - 24 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.