The main menu "Problem" offers the following features:

• Generate: Generates a new Sudoku, either a normal Sudoku or a X-Sudoku.
• Solve: Solves the current problem. If the option "Find all Solutions" is checked, all solutions are found.
• Find Minimal Allocation: Searches for a minimal allocation of the current problem.
• Show Definitive Values: Fills all cells with a unambigious allocation.
• Validate: Validates the current allocation.
• Check: Checks the current allocation, if it is a formal valid Sudoku.
• Info: Displays information about the current problem including the severity level.
• Edit Comment: Offers the possibilty to add or change a comment for the current problem. This comment is printed out below the problem.
• Fix Current Values: Sets the current allocation to "Read Only".
• Release Current Values: Releases all values, so that values in all cells can be changed.
• Reset: Resets the current problem.
• Clear Candidates: Clears all candidates.
• Abort: Aborts the solving of the current problem or the generation of a new one.