public static Sudoku GetSudoku(string groupName)
{
if (!Sudokus.ContainsKey(groupName))
{
Sudokus[groupName] = SudokuEngine.CreateSudoku(groupName);
}
return(Sudokus[groupName]);
}
public static Sudoku GetSolvedSudoku(string groupName)
{
if (!SolvedSudoku.ContainsKey(groupName))
{
SolvedSudoku[groupName] = SudokuEngine.Solve(groupName);
}
return(SolvedSudoku[groupName]);
}