http://www.gamezhero.com/go/railroadshuntingpuzzle2/null/game-walkthrough/?utm_campaign=railroadshuntingpuzzle2&utm_source=uploads.ungrounded.net&utm_medium=game-walkthrough&session=null&session_hash=b174db801c1c72db11658765c4d860e5 is the link that is supposed to have the walkthrough. It does not work and is not archived. Neither are any of the pages linked in this walkthrough (http://web.archive.org/web/20140929091847/http://www.gamezhero.com:80/games/railroadshuntingpuzzle2/walkthrough) and this walkthrough video is broken (http://www.crazygames.com/game/railroad-shunting-puzzle-2). I could find no other walkthroughs or gameplay beyond c-2.