SUDO9x9 (sudoku)

The most professional, most fun, most puzzle Sudoku game is online now!
- 4000 sudokus more than other game
- 762 levels, from simple to medium to difficultgive.
Playing sudokus is good for your brain.It can effectively your memory skills and visual communication.

Three different input modes:

1 Normal mode, click a cell and then click on the digital keyboard to enter a number .
2 Lock mode, click lock button on the keyboard, select a number on the keypad, then each click on a cell will automatically entered the lock number.
3 Edit mode, select a cell, click on the pencil key button, and then click the possible numbers, they will shown in the cell.
There are also conflicts prompt, if the number in a cell are conflict with the numbers in other cell, they will be displayed in red.

Sudoku origin
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 (also called "boxes", "blocks", "regions", or "sub-squares") contains all of the digits from 1 to 9. The puzzle setter provides a partially completed grid, which typically has a unique solution.
Completed puzzles are always a type of Latin square with an additional constraint on the contents of individual regions. For example, the same single integer may not appear twice in the same 9×9 playing board row or column or in any of the nine 3×3 subregions of the 9×9 playing board.
The puzzle was popularized in 1986 by the Japanese puzzle company Nikoli, under the name Sudoku, meaning single number.It became an international hit in 2005.