This page explains how Robert George Su (USATT# 1176810)'s rating went from 1893 to 1888 at the 59th Butterfly St. Joseph Valley Open held on 16 Mar 2024 - 17 Mar 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.