Sudoku Solver: Scan & Play

Point the camera at a sudoku in a newspaper and keep playing it here.

No interruptions. No banners. No ads between puzzles.

SCAN A PUZZLE FROM PAPER
Photograph the grid and the app reads it — the printed clues, the answers
you have already written, and a candidate from each square you pencilled
in. It tells the three apart by the ink itself, so what the paper printed
stays locked and what you wrote stays yours. Check it against the page in
two steps, fix anything it misread, and carry on from where you were.

The photo is processed on your device, is never uploaded, and is deleted
before you leave the screen.

HINTS THAT EXPLAIN, NOT JUST SOLVE
Ask for help and you choose how much of it you take. First where to look.
Then the name of the technique and why it works here, on your board, with
the cells marked. Only then the answer. Twenty-six techniques, from Naked
Singles to XY-Chains — and if a position has no technique to name, the game
says so and gives you the number anyway.

Each hint costs one coin, and so does filling in every pencil mark at once.
You start with 10 coins and earn one for each daily challenge you solve;
more coins, or unlimited hints for good, are available as in-app purchases.
Every puzzle can be solved without spending anything.

FIVE DIFFICULTIES, GRADED PROPERLY
Easy to Master. Difficulty is measured by the logic a puzzle actually
requires, not by how many squares are blank. Every puzzle has exactly one
solution and can be solved by reasoning alone. No guessing, ever.

A DAILY CHALLENGE
One puzzle a day. It starts at Easy or Medium and only gets harder as your
streak grows. Solve it and earn a coin.

BUILT FOR LONG SESSIONS
Pencil marks with auto-fill. Full undo and redo. Light, dark and AMOLED
themes. Your board saves after every move. Every puzzle you finish is kept
with its time and date, and you can play any of them again. Statistics,
streaks, and a record of which techniques you have mastered.

PLAYS OFFLINE
No account. No sign-up. No internet needed. Your boards, your stats and
your coins stay on your device. The game sends anonymous counts of which
puzzles get played, and you can switch that off in Settings.