This page explains how Sung Choi (USATT# 1164150)'s rating went from 1546 to 1520 at the PPC 2023 Summer Open held on 22 Jul 2023 - 23 Jul 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.