Fill every row, column and 3×3 box with the numbers 1 to 9. No number repeats within a row, column or box.

• Tap a cell, then choose a number.
• Normal mode enters one number in a cell. Candidate mode pencils in several possibilities.
• Need a clue? Open the menu and choose Hint to see the next logical cell.
• Choose from three levels each day: easy, medium and hard.

Keyboard shortcuts

• Arrow keys move between cells.
• 1 to 9 enter a number.
• Backspace or Delete clears a cell.