
How to use
This is what the buttons do:
 Hint: Get a hint.
 Show Candidates: Display candidate values for empty cells
 Hide Candidates: Hides candidate values in empty cells
 Solve: Solves the Sudoku completely
 Solve Cell: Solves the Sudoku for a single cell. Click in the cell you want to solve first
 Check: Checks if the Sudoku is valid and can be solved
 Check Unique Solution: Checks if the Sudoku has a unique solution
 Rate Difficulty: Displays a difficulty rating of the Sudoku
 Print: Opens a new window from which the Sudoku can be printed
 Clear: Clears the puzzle
 Save: Generates a file containing the current values in the Sudoku grid for downloading
16 By 16 Sudoku Solver