This page explains how Xiangjie Ji (USATT# 222424)'s rating went from 1893 to 1887 at the PTTC Saturday League event from 30 Dec 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.