This page explains how Zhanjian Luo (USATT# 22970)'s rating went from 1816 to 1812 at the QTTC May Open held on - 26 May 2013. 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.