🔢 Number Nine
Fill every row, column, and box with 1 through 9. No guessing needed, every puzzle has one real solution.
How to play
- Tap a cell, then tap a number (or type it) to fill it in.
- Every row, column, and 3x3 box needs each number 1-9 exactly once.
- Tap Check any time to see which filled cells don't match yet, no penalty.
- Tap Hint for a free correct answer, as many times as you want.
- Pick Easy, Medium, or Hard for more or fewer starting clues.
A real sudoku-style logic puzzle, generated fresh every time
Number Nine is an original take on the classic 9x9 number-grid puzzle: fill the grid so every row, every column, and every 3x3 box contains each digit from 1 to 9 exactly once. Unlike a puzzle generator that just deletes random cells from a finished grid, every puzzle here is checked with a real backtracking solver before it's shown to you, confirming it has exactly one valid solution. That means if you get stuck, the answer really can be worked out logically, not guessed.
Three difficulties (Easy, Medium, Hard) change how many starting numbers you're given, from a gentle warm-up to a genuinely sparse grid that rewards careful elimination. Selecting a cell highlights its row, column, and box, and any other cell already holding the same number, small visual helpers that make it easier to spot conflicts without doing all the bookkeeping in your head.
There's no penalty for a wrong guess and no timer pressure. Tap Check any time to see which of your entries don't match yet, and tap Hint as often as you like for a free, correct answer. Like every game on AnonArcade, it's free with no download and no account, and your fastest solve time is tracked locally for each difficulty. Browse more logic and brain-teaser games on the Puzzle Games page.
Frequently asked questions
How do I play Number Nine?
Tap an empty cell, then tap a number 1-9 (or type it on a keyboard) to fill it in. Every row, every column, and every 3x3 box must end up with each number exactly once, the same rules as classic sudoku.
Is every puzzle actually solvable?
Yes. Each puzzle is generated with a real solving algorithm that checks it has exactly one valid solution before it's ever shown to you, not just a random grid with holes poked in it.
What if I get stuck?
Tap Hint any time for a free, correct answer in the selected cell (or a random empty one), as many times as you like. Tap Check to see which of your filled-in cells don't match yet, highlighted in red, with no penalty.
What's the difference between the three difficulties?
They change how many numbers are already filled in for you at the start. Easy gives you the most starting clues, Hard gives you the fewest.