[0, 6, 0, 0, 9, 0, 0, 0, 0],
[0, 7, 9, 0, 0, 4, 0, 3, 2],
[0, 2, 0, 0, 0, 3, 0, 0, 4],
###########################
[0, 4, 2, 0, 0, 8, 0, 0, 0],
[1, 0, 0, 6, 2, 9, 0, 0, 7],
[0, 0, 0, 4, 5, 0, 2, 8, 0],
###########################
[4, 0, 0, 5, 0, 0, 0, 2, 0],
[7, 1, 0, 8, 0, 0, 6, 5, 0],
[0, 0, 0, 0, 3, 0, 0, 1, 0],
]
grid3 = [
[0, 0, 0, 0, 0, 5, 0, 6, 8],
[0, 0, 3, 0, 0, 0, 7, 0, 0],
[9, 0, 0, 7, 0, 8, 4, 0, 2],
###########################
[3, 0, 0, 6, 0, 9, 2, 1, 0],
[1, 2, 0, 0, 8, 0, 0, 9, 4],
[0, 4, 9, 5, 0, 2, 0, 0, 6],
###########################
[2, 0, 4, 1, 0, 3, 0, 0, 5],
[0, 0, 7, 0, 0, 0, 9, 0, 0],
[5, 9, 0, 2, 0, 0, 0, 0, 0],
]
sudoku = Grid(grid3)
print(sudoku.solve())
