/// <summary>
/// Creates a default 9x9 sudoku completely unsolved puzzle grid
/// with each cell populated by the default alphabet.
/// </summary>
public Grid()
{
Alphabet = "123456789";
GridArr = new Cell[9, 9];
SubgridRows = 3;
SubgridCols = 3;
//create all default cells
for (int x = 0; x < GridArr.GetLength(0); x++)
{
for (int y = 0; y < GridArr.GetLength(1); y++)
{
GridArr[x, y] = new Cell(x, y, Alphabet);
}
}
}