Sudoku Challenges

Sudoku Challenges is a logic-based, combinatorial number-placement puzzle. The objective is to complete a 9 × 9 grid with digits, ensuring that each column, row, and 3 × 3 sub-grid (referred to as "boxes" or "blocks") contains all digits from 1 to 9. Each puzzle will start with a partially filled grid, which has a single valid solution.

Tap a cell to select it.
Tap a digit at the bottom row to enter it into the selected cell.
Use the eraser to clear the current cell.
Tap the Note button to activate the draft mode.
Utilize hints judiciously to reveal any cells.