Use sudoku100 to view the solution of any sudoku.

Enter your puzzle with the number keys. Change the focused square with the arrow keys, enter, space, or the mouse.

When one unique solution is found, the empty squares will become gray.

Click on a gray square to reveal that square's answer, or right-click to view the entire solution.

If a square turns red, it means that entering that number would make the puzzle unsolvable.