This page explains how Louis Schlessinger (USATT# 86783)'s rating went from 1623 to 1619 at the Trolley Car TTC Tuesday Night League event from 9 Jun 2015. 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.