Sudoku is a logic puzzle about comparing rows, columns, and smaller regions to fill an incomplete grid. The focus is not fast arithmetic, but deciding which numbers are possible and which can be ruled out.
Each confirmed entry creates information for the next one. Study the wooden tiles and build a complete board through choices you can explain.
How to play
- Select START and choose EASY, NORMAL, or HARD.
- Examine the given numbers and look for a row, column, or 3×3 region with relatively few blanks.
- Select a number from the keypad first, then tap the empty cell where you want to place it.
- For a cell that is not yet certain, turn on Memo and add candidate numbers.
- After an entry, recheck the affected row, column, and region.
- Work toward filling every blank according to the rules.
