A little curiosity. A lot of deduction.

Five houses.
Fifteen clues.
One solution.

Who owns the fish? Follow the clues, connect the dots, and find your way through the classic Einstein’s riddle.

Get the game How does it work?

Free & open source · Windows & Linux desktop · English & Serbian

15 clues to untangle

5 houses to complete

3 attempts to get it right

You against the puzzle

THE CHALLENGE

No guessing required.
Just a good train of thought.

Five neighbours have different nationalities, drinks, sports, and pets. Each lives in a different coloured house. Your job is to work out who belongs where.

01 / READ

Start with a clue.

Some tell you a direct match. Others describe a neighbour or a position. Every detail matters.

02 / CONNECT

Build the neighbourhood.

Choose each house’s attributes. Used answers become unavailable in the other houses; checked clues move out of your way.

03 / SOLVE

Put your logic to the test.

Fill the grid, then check your solution. You have three attempts. Solve it and save your time to your local rank list.

A SPACE TO THINK

The classic puzzle.
A clearer way to play.

All your houses and clues in one place, with a few thoughtful touches to keep your attention on the puzzle.

The desktop game showing the five-house answer grid, fifteen clues, pause controls, and timer
The actual desktop app · English interface

Take your time.

Pause when life interrupts. Your answers stay put and the clock waits for you.

Keep your place.

A clue counter and a separate checked group help you focus on what is left.

Make it yours.

Switch between English and Serbian Latin without losing progress. Compare your solved times in the local rank list.

YOUR NEXT GOOD CHALLENGE

Ready to meet
the neighbours?

Choose your download. The Windows installer includes Java; the portable version needs Java 11 or newer and a graphical desktop.

Checking the latest published release…

WINDOWS · MSI INSTALLER

Install. Open. Think.

Java is included. Installs for your user, with Start Menu and desktop shortcuts.

View Windows releases

Unsigned installer; Windows may show a SmartScreen warning. Uninstall through Settings → Apps.

PORTABLE · JAVA JAR

Bring your own Java.

For Linux desktops and Windows with Java 11+. Includes the images and SQLite driver.

View JAR releases

After downloading, run:

java -jar einstein-intelligence-test.jar

No published package yet? Browse successful builds (GitHub sign-in required for artifacts), or build from source.

A few things to know

Does it need an account or internet connection?

No account is needed to play. The puzzle and rank list run locally on your computer.

Where are my results saved?

Your rank list stays in .einstein-intelligence-test/winners.db under your home folder. Results are local to your computer.

Are there any Windows limitations?

The website and email links in the About dialog currently use a Linux command and do not open on Windows. You can visit the author’s website using the link in this page’s footer.

Is this really an intelligence test?

It is a deduction puzzle, not a validated IQ assessment. Play for the satisfaction of working it out.

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