static void Main(string[] args)
{
string easy = "619030040270061008000047621486302079000014580031009060005720806320106057160400030";
string easy1 = "000000307048720010005014008250003876000000000671200039500840700030052980106000000";
string easy2 = "409120030050903100000040089910004007020010060600800051780030000004709010090065408";
string easy3 = "060001020970820400035004001604000018007000200820000605700900130002067094040500080";
string medium = "000300000001080070980007610007900040204000308060008900075800031020060700000004000";
string hard = "000004800590200004100800090001000508070000040309000100030001002200008067004900000";
string expert = "060090020100000000070001800015300002000604000800005430003400050000000009050070060";
string diabolic = "000000000000003085001020000000507000004000100090000000500000073002010000000040009";
string diabolic2 = "900040000000010200370000005000000090001000400000705000000020100580300000000000000";
string zen = "000000000000000000000000000000000000000010000000000000000000000000000000000000000";
string test1 = "305420810487901506029056374850793041613208957074065280241309065508670192096512408"; // Singles
string test2 = "002030008000008000031020000060050270010000050204060031000080605000000013005310400"; // Hidden SIngles
string test3 = "090300001000080046000000800405060030003275600060010904001000000580020000200007060"; // Unsolveable
Sudoku sudoku = new Sudoku(zen);
sudoku.PrintSuduko();
if (!sudoku.Solve())
{
sudoku.SolveBasic();
}
sudoku.PrintSuduko();
Console.ReadLine();
}