This page explains how Megan Xie (USATT# 221530)'s rating went from 1199 to 1168 at the Trolley Car TTC October 2019 Open held on 19 Oct 2019 - 19 Oct 2019. 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.