FAQ
Frequently asked questions.
Is Puzzlumina free to use?
Yes. You can create a free account and start playing immediately. Premium features may be introduced in the future, but the core puzzle experience will always have a free tier.
How are the puzzles generated?
Every puzzle is generated algorithmically using a constraint-based solver that guarantees a unique solution. No two puzzles are the same.
What puzzle sizes are available?
Sudoku is available in 4×4 and 9×9. A 16×16 size is in development and will be released soon.
How do hints work?
You have one hint available at a time. Using it reveals one correct empty cell. After using a hint, a 5-minute cooldown starts before your next hint becomes available.
What happens if I make too many mistakes?
Each puzzle size has a mistake limit (2 for 4×4, 5 for 9×9). If you reach the limit, you can choose to reveal the solution or restart the puzzle from scratch.
Can I save my progress and continue later?
Yes. Your puzzle state — including the board, notes, timer, and mistake count — is saved automatically after every move.
Can I print puzzles?
Yes. You can print any puzzle as a formatted page, or export it as a PDF. Optionally include the solution.
What other puzzle types are coming?
Nonogram, Kakuro, and KenKen are on our roadmap. We'll announce new types as they become ready.
Something not answered here? Contact us.