Rules of the Game

Fill in the grid so that every row, every column and every 3x3 box contains digits 1 through 9.You can work along rows, columns and 3x3 box one by one. But begin with the group with the most number of givens. Each puzzle has a unique solution and can be solved by logic. But sometimes guessing helps esp in case of hard puzzles.

New Game

Clicking on will give options to generate a puzzle out of the four difficulty levels : Simple, Easy, Medium and Hard.

Playing Game

To make an entry in the grid, first select a radio button (1-9). Left clicking at a point makes the entry. If the Warning button is ON , the correct entry will be reflected in blue colour and incorrect entry will be reflected by red colour If Warning is OFF then incorrect entries will not be reflected and all the entries will be in blue. Expert Sudokool players can use pencil feature to work out a puzzle. Right click will put a grey coloured pencil entry which can be used as a rough work. Right clicking again on a wrong entry or a pencil mark will delete it.

Custom Puzzle

If you want to play a puzzle from newspapers,magazines etc. Then you can use the Custom Puzzle feature of Sudokool. Click on and enter puzzle directly on the puzzle grid. After filling the puzzle, click on to verify the puzzle.If Sudokool verifies that the puzzle has a unique solution, it will be loaded and can be played.

Save/Load Game

You can save game at any point by clicking on and the same can be loaded again through

Pause/Resume Game

Pause using which will pause the time and hide the puzzle. Resume by game by clicking on which appears after you click on pause button.

Hints

You can turn hints ON/OFF using. Hints are nothing but all the possible entries which can be made at any point.Hints get updated automatically as you make entries on the grid.

Play Again

You can play the last loaded puzzle again from the beginning.

Show Solution

View solution of the currently loaded puzzle at any point in the game.