Sudoku

Infinite Sudoku with random generation. Button Solve. 4 levels of difficulty.
The Sudoku is a logic game consisting of a square grid of 81 cells that must be filled with the missing numbers, from 1 to 9. The goal is to insert the numbers in such a way that in each row, in each column and in each sub-frame each number appears only once. To play, simply select the check box on the grid of interest (which will take the yellow color as the background) and then the number to be entered by selecting it from the panel to the right of the grid. The cells with the blue numbers are blocked and can not be selected or modified. Upon completion of the grid, if the solution is correct, the message of congratulations and the time taken for resolution. Conversely necessary to verify the correctness of the entered numbers and duplicates. If you can not find the solution Solve button, represented by the green light, it will show the solution highlighting in red the numbers wrong.