Haboku

Kakuro, in ink. Haboku (破墨, “broken ink”) takes its name from the sumi-e wash technique.

Haboku is in a closed test on Google Play now. Join the test and play it before its release.

Join the Haboku test

Fill each run of white cells with the digits 1 to 9 so that they add up to the clue, with no digit twice in a run. The rules are short. The puzzles go deep.

What is in it

• Puzzles with one answer. A generator and a solver prove that every puzzle has exactly one solution. They run on your phone, or ahead of time for the optional puzzle library, a 3 MB download for phones that are slow to make puzzles. Each puzzle is graded from Learning to Insane.
• Curated packs to work through at your own pace.
• A puzzle of the day, the same for every player.
• An optional tutorial for players new to Kakuro.
• Puzzle sharing. Send a puzzle to a friend as a short code.
• Music and sound effects, made for the game.
• Optional sign-in with Google, so the server can verify your scores. You can play everything without it.

Get it

Haboku is in a closed test on Google Play now. Join the test to play it early. The public store page will follow.

Your data

Without signing in, nothing personal leaves your phone. The Haboku privacy policy says what signing in stores and why. To delete your account, use the app or ask for deletion here.