Sudoku Solver: Scan & Play

Stuck on the sudoku in the paper? Photograph it and finish it here — with hints that name the technique and show you why, on your own board.

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.

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, the same for everyone. 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.