public static SudokuGrid NewGame()
{
Random r = new Random();
var grid = new SudokuGrid();
List <int> list = new List <int>(9);
for (int i = 0; i < 9; i++)
{
list.Insert(r.Next(list.Count + 1), i + 1);
}
//Grille de base)
for (int i = 0; i < 9; i++)
{
grid[i, 0].Cell.StartCell = list[i];
grid[i, 1].Cell.StartCell = list[(i + 3) % 9];
grid[i, 2].Cell.StartCell = list[(i + 6) % 9];
grid[i, 3].Cell.StartCell = list[(i + 1) % 9];
grid[i, 4].Cell.StartCell = list[(i + 4) % 9];
grid[i, 5].Cell.StartCell = list[(i + 7) % 9];
grid[i, 6].Cell.StartCell = list[(i + 2) % 9];
grid[i, 7].Cell.StartCell = list[(i + 5) % 9];
grid[i, 8].Cell.StartCell = list[(i + 8) % 9];
}
//On mélange les lignes/colonnes
int n;
for (int i = 0; i < 3; i++)
{
for (int j = 0; j < 3; j++)
{
n = r.Next(3);
grid.InvertLines(i + (3 * j), n + (3 * j));
n = r.Next(3);
grid.InvertCols(i + (3 * j), n + (3 * j));
}
}
//On efface les cases
int nbCases = 9 * 9;
int[] byNumber = { 9, 9, 9, 9, 9, 9, 9, 9, 9 };
int[] bySquare = { 9, 9, 9, 9, 9, 9, 9, 9, 9 };
Cell c;
while (nbCases > 35)
{
int x = r.Next(9);
int y = r.Next(9);
int sqNumber = (x / 3) * 3 + y / 3;
c = grid[x, y].Cell;
if (c.IsStartCell() && byNumber[c.Number - 1] > 2 && bySquare[sqNumber] > 2 && (sqNumber != 4 || bySquare[4] > 3))
{
nbCases--;
byNumber[c.Number - 1]--;
bySquare[sqNumber]--;
c.StartCell = 0;
if (x != 4 || y != 4)
{
x = 8 - x;
y = 8 - y;
sqNumber = (x / 3) * 3 + y / 3;
c = grid[x, y].Cell;
nbCases--;
byNumber[c.Number - 1]--;
bySquare[sqNumber]--;
c.StartCell = 0;
}
}
}
IsolatedStorageHelper.SaveObject("sudoku", grid);
return(grid);
}
