This page explains how Gary Ng (USATT# 230156)'s rating went from 1507 to 1433 at the 2024 Butterfly SPTTC April Open held on 27 Apr 2024 - 28 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.