This page explains how Sung Choi (USATT# 1164150)'s rating went from 1553 to 1509 at the PPC 2024 Winter Open held on 20 Jan 2024 - 21 Jan 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.