Nonogram
A logic puzzle game where every puzzle has exactly one solution.
Pure deduction, no guessing
Nonogram gives you a grid and a set of clues for each row and column. The clues tell you how many consecutive cells are filled. Your job: figure out the picture using nothing but logic. Every puzzle generated by this app is guaranteed to have a unique solution, verified by a built-in constraint solver before it reaches you. If you can deduce it, you can solve it.
How it works
- Pick your grid. 5x5 for a quick break. 10x10 for a satisfying solve. 15x15 if you want to think.
- Pick your difficulty. Easy, Medium, or Hard control how dense the fill pattern is — denser puzzles give you more information to work with; sparser ones make you earn it.
- Tap to fill, double-tap to switch modes. Fill cells you’re sure about. Mark cells you know are empty. The controls stay out of your way.
- Five lives. Make a mistake and you lose a life. Lose all five and the puzzle ends. No undo, no hints beyond peek — just your logic against the grid.
What makes it different
- Every puzzle is solvable by logic alone. No ambiguity, no guessing. A constraint-propagation solver verifies uniqueness before a puzzle is served to you.
- Responsive across devices. Designed for phones, tablets, and desktop browsers. The layout adapts — side panels on wide screens, compact grid on narrow ones.
- Accessible. Hint text scales with your OS font size settings. No clipping, no overflow.
- Clean and fast. No ads. No accounts. No tracking. Just puzzles.
Play it
Nonogram is available on the web and coming soon to the App Store.