This page explains how Yiming Luo (USATT# 927355)'s rating went from 653 to 520 at the California State Championship 2017 held on 5 May 2017 - 7 May 2017. 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.