This page explains how Qingzhou Luo (USATT# 198478)'s rating went from 1712 to 1670 at the 2nd Table Tennis America Open held on 18 Nov 2017 - 19 Nov 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.