0:00
{"difficulty": "hard", "puzzle": [[0, 7, 0, 1, 0, 0, 0, 5, 0], [0, 0, 0, 7, 0, 3, 9, 0, 0], [0, 0, 1, 2, 0, 0, 0, 0, 0], [4, 0, 0, 0, 0, 2, 0, 0, 0], [0, 9, 0, 0, 0, 0, 8, 0, 0], [8, 0, 3, 0, 0, 0, 0, 7, 0], [6, 0, 8, 0, 0, 0, 0, 0, 7], [0, 0, 5, 0, 3, 0, 6, 0, 0], [0, 0, 0, 4, 0, 0, 3, 9, 0]], "solution": [[3, 7, 9, 1, 4, 8, 2, 5, 6], [2, 6, 4, 7, 5, 3, 9, 8, 1], [5, 8, 1, 2, 9, 6, 7, 3, 4], [4, 5, 7, 3, 8, 2, 1, 6, 9], [1, 9, 6, 5, 7, 4, 8, 2, 3], [8, 2, 3, 6, 1, 9, 4, 7, 5], [6, 3, 8, 9, 2, 1, 5, 4, 7], [9, 4, 5, 8, 3, 7, 6, 1, 2], [7, 1, 2, 4, 6, 5, 3, 9, 8]]}
