Sudoku, originally called Number Place is a logic-based combinatorial number-placement puzzle. In classic sudoku, the objective is to fill a 9×9 grid with digits so that each column, each row, and each of the nine 3×3 subgrids that compose the grid (also called "boxes", "blocks", or "regions") contain all of the digits from 1 to 9. The puzzle setter provides a partially completed grid, which for a well-posed puzzle has a single solution.
Chinese-漢字 Sudoku have several features in game:
- Saving "not solved board", and you can load the board anytime
- Hints
- Note or scratch field
- Score board
- Difficaulty level easy, moderate, difficult, hard
- 6x6, 9x9, 12x12 boards