[
    {
        "rows": 6,
        "cols": 6,
        "numbered_cell_probability": 0.4
    },
    {
        "rows": 5,
        "cols": 5,
        "numbered_cell_probability": 0.3,
        "zero_cell_probability": 0.2
    },
    {
        "rows": 6,
        "cols": 6
    },
    {
        "rows": 5,
        "cols": 5,
        "numbered_cell_probability": 0.3
    },
    {
        "rows": 7,
        "cols": 7,
        "numbered_cell_probability": 0.5,
        "zero_cell_probability": 0.3
    },
    {
        "rows": 8,
        "cols": 8
    },
    {
        "rows": 7,
        "cols": 7,
        "numbered_cell_probability": 0.5
    }
]