What's new · modelrailsim.com

Version 2.2 October 11, 2026

Your games follow you. Saves, macros, settings and the layouts you add or design are kept with your account, so they're there on any computer you sign in on.
Personal bests and a leaderboard. Every puzzle you finish is recorded. The finish summary shows your best and your rank, and the new Leaderboard has each puzzle's best runs.
Idea updates by email. When an idea you voted for is planned, started, delivered or declined, we'll let you know. You can turn this off on your Account page.
Confirm your email. New accounts get a confirmation link, which also protects password resets.
A quick "I am human" check on sign-up keeps bots out.
This page, and the version number in the footer.

Ideas & suggestions. Suggest features and vote for the ones you want. Before you post, the AI checks whether someone has already asked for the same thing.
Saves are named after their layout, and hovering a save shows what's in it.
Points set against you moved to the Turnouts panel.

modelrailsim.com launches, with free accounts (a username and password, or Google or Apple).
The AI features, solving puzzles, the end-of-puzzle assessment and the layout designer, run for every account.

A guided tour, from the screen as a whole to the details. Moves only count while a puzzle is in progress.

Create layout: describe a layout and the AI designs it with real Kato Unitrack pieces.
Layout files (add, export and remove), and the Märklin C-Track 260×180 layout.
Each puzzle explains its objective and rules. Finishing shows your score with an AI assessment, and Replay starts the same puzzle again.

A choice of layouts: the classic Inglenook, Inglenook with Industry Spur, and John Allen's Timesaver, with a solver and AI for each.

The Inglenook Sidings puzzle on a Kato N-scale layout, the Power Cab throttle, headshunt rules, power routing and Solve with AI.