This page explains how Victor Xie (USATT# 93758)'s rating went from 1800 to 1790 at the PTTC Saturday League event from 16 Sep 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.