Nubo Suite
Puzzles that teach you the next move.
Sudoku for puzzle fans where every puzzle can be solved by logic alone, never by guessing. Ask for a hint and you get the technique and the reason, not just the number, so you learn as you play. Included in every Nubo plan, at one per-seat price for all apps.
- Honest difficultyLevels reflect the techniques a puzzle forces on you.
- Explained hintsNames the technique and highlights the cells.
- One solutionUniqueness is checked for every puzzle.
- Daily puzzleThe same one for everyone each day.
Easy to Expert, measured by reasoning.
Easy and Medium use singles, differing in how many clues you start with. Hard needs pointing pairs and naked pairs. Expert needs hidden subsets, X-Wings and Y-Wings.
Learn the deduction, not just the answer.
A hint might say that a digit in a box can only sit in one row, so it can be removed elsewhere in that row. The cells involved are highlighted.
Total undo and redo.
Try a line, back out of it, and carry on. Hint eliminations are kept apart from your own pencil marks so repeated hints keep moving forward.
And everything around it.
No guessing
Puzzles the technique ladder cannot finish are rejected.
Keypad counts
Shows how many of each digit remain.
Keyboard play
An accessible grid you can drive from the keyboard.
Records
Personal bests, merged so one can never be lost.
Account copy
Optional second copy of your progress.
Steady timer
Keeps counting correctly in a background tab.
Works with the rest of Nubo.
Sudoku shares your Nubo sign-in with every other app.
Frequently asked
- Is every puzzle solvable without guessing?
- Yes. Generation rejects any grid that the human-technique solver cannot finish.
- Do I need an account?
- No. Progress saves in your browser first. An account is an optional second copy.
- Is the daily puzzle the same for everyone?
- Yes. It uses a seeded generator, so everyone gets the same grid for the day.
Sudoku is included in every plan.
Taxes are added at checkout where they apply. Compare plans