static void Main(string[] args)
{
SudokuWriter sudokuWriter = new SudokuWriter();
ImmutableSudokuGrid filledGrid = sudokuWriter.CreateFilledGrid();
filledGrid.PrintGrid();
Console.WriteLine("\n");
ImmutableSudokuGrid emptiedGrid = sudokuWriter.EmptyGridForHardSolve(filledGrid);
emptiedGrid.PrintGrid();
Console.WriteLine("\n");
SudokuGrid mutableEmptiedGrid = emptiedGrid.MakeMutableCopy();
SudokuSolver sudokuSolver = new SudokuSolver();
sudokuSolver.Solve(mutableEmptiedGrid);
mutableEmptiedGrid.PrintGrid();
if (mutableEmptiedGrid.FindAllEmptySquares().Count != 0)
{
Console.WriteLine("\n");
HarderSudokuSolver harderSolver = new HarderSudokuSolver();
ImmutableSudokuGrid solvedGrid = harderSolver.Solve(emptiedGrid);
solvedGrid.PrintGrid();
}
}
