Sudoku Challenges are free no downloads games that are based on logic and combinatorial number placement. The aim here is to fill a 9×9 grid with digits ensuring that each column, each row, and each of the nine 3×3 sub-grids that make up the overall grid (also termed as "boxes" or "blocks") contain every digit from 1 to 9. These puzzles begin with a partially filled grid and only have one solution.
Instructions:
Tap a cell to select it.
Tap a digit at the bottom row to fill it into the selected cell.
Use eraser to clear the current cell.
Tap the Note button to turn on the draft mode.
Use hints wisely to reveal any cells.
