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**Seed**: Allows the board to be filled quickly form the seed box

Wordoku Solver