This page explains how Shiyou Xu (USATT# 271211)'s rating went from 1321 to 1264 at the 2023 July Open @ Princeton Pong held on 1 Jul 2023 - 2 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.