[
  {
    "id": "sudoku-01",
    "name": "练习 1",
    "grid": [
      [0, 4, 0, 0, 0, 7, 0, 0, 0],
      [9, 0, 7, 5, 0, 2, 0, 0, 0],
      [5, 6, 0, 0, 0, 3, 0, 1, 7],
      [1, 0, 5, 0, 2, 8, 0, 0, 9],
      [6, 2, 0, 0, 3, 9, 0, 7, 5],
      [4, 0, 0, 1, 0, 5, 6, 0, 0],
      [0, 0, 6, 2, 0, 4, 0, 9, 1],
      [3, 0, 1, 7, 0, 0, 2, 0, 0],
      [0, 0, 0, 0, 9, 1, 0, 5, 0]
    ]
  },
  {
    "id": "sudoku-02",
    "name": "练习 2",
    "grid": [
      [0, 0, 0, 5, 4, 0, 7, 1, 8],
      [0, 0, 0, 7, 0, 0, 0, 9, 6],
      [0, 0, 8, 0, 0, 0, 0, 0, 3],
      [0, 6, 5, 4, 0, 7, 1, 0, 0],
      [0, 0, 2, 9, 0, 0, 0, 3, 7],
      [0, 0, 7, 1, 8, 2, 0, 0, 5],
      [3, 7, 0, 0, 2, 9, 0, 0, 0],
      [6, 5, 4, 0, 7, 1, 0, 0, 0],
      [8, 0, 9, 6, 0, 4, 0, 0, 1]
    ]
  },
  {
    "id": "sudoku-03",
    "name": "练习 3",
    "grid": [
      [3, 6, 0, 0, 0, 0, 0, 1, 0],
      [0, 1, 9, 3, 0, 4, 7, 2, 5],
      [0, 0, 0, 8, 1, 9, 3, 6, 4],
      [0, 0, 2, 5, 0, 0, 0, 0, 6],
      [5, 8, 1, 0, 3, 0, 0, 7, 0],
      [0, 0, 0, 4, 7, 0, 0, 0, 1],
      [0, 0, 0, 0, 0, 7, 2, 0, 0],
      [0, 5, 0, 1, 0, 3, 0, 4, 7],
      [6, 0, 7, 0, 0, 0, 1, 9, 0]
    ]
  }
]