How we make our Kakuro puzzles

Splash Logic is a small studio in Germany. We make calm, fair puzzle games, and Kakuro is our first. This page shows how we pick and shape our puzzles, because that is what we care about most.

By Splash Logic · Updated 26 October 2026

A program can make boards by the dozen. We decide which ones deserve your time.

Chosen by hand

We play every puzzle ourselves. We keep the ones we enjoy, and only then put them on your phone. A puzzle is ready when we like playing it and want to go on.

Fair difficulty, steady progress

We look at three things: difficulty, progression, and how well a puzzle holds your attention. Difficulty must rise fairly. Each puzzle should lead to the next. The whole game should be a pleasure to play.

Not a copy

Millions of apps copy each other. We do not want to. We would rather make one good game than five quick ones.

What a computer checks

One promise matters too much to leave to taste: each puzzle has one answer, and you can reach it by logic. A computer checks this. Two separate programs, which share no code, solve each board. If their answers differ, or either finds a second answer, we drop the puzzle. A third program solves it using only techniques a person can use, and it never guesses. Its steps become the hints in the app, so a hint can tell you why a square takes a certain digit.

What this means for you

You will never meet a puzzle that logic cannot solve. If you are stuck, the answer is on the board, not behind a guess.

The studio

Splash Logic began in 2026 and is based in Germany. We are a small team, and we read every message players send.

Questions, bugs or a puzzle that looks wrong: support [at] splashlogic [dot] app.