This page explains how Tim Hui (USATT# 88906)'s rating went from 1620 to 1633 at the Trolley Car TTC Tuesday Night League event from 15 Oct 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.