Sudoku (originally called Number Place) is a logic-based, combinatorial number-placement puzzle. The objective is to fill a 9×9 grid with digits so that each column, each row, and each of the nine 3×3 sub-grids that compose the grid contains all of the digits from 1 to 9.
FEATURES:
– different difficulties
– hundreds of puzzles for each difficulty
– auto pencil mark (draft)
– hint system