The object in this flash Sudoku games is to fill in the grid so that every row, every column, and every 3x3 box contains the digits 1 to 9. There are 75 levels to solve. These are split into Easy (1 to 25), Medium (26 to 50) and Hard (51 to 75).
Instructions: After you have allowed enough time for this flash Sudoku game to finish loading in your browser, click your mouse on the white "START" in the middle of the game area.
Use the keyboard to select the squares using the arrow keys and then type in the digit you want. 0 will set the square to empty. Or you can fill in the grid by selecting squares with your mouse and picking digits from the small grid that pops up.
Use the hint button if you get stuck. Select the square you need help on and click "Use Hint" to fill in the correct digit. You can only use 3 hints per level. There is a timer, but there is no time limit on how long you take.
