This page explains how Xiangjie Ji (USATT# 222424)'s rating went from 1800 to 1755 at the PTTC Saturday League event from 21 Apr 2018. 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.