{
  "id": 21,
  "name": "Inversion",
  "chapter": 3,
  "grid": "8x8",
  "par": 14,
  "difficulty": "Hard",
  "mechanics": [
    "slide",
    "rotate",
    "flip"
  ],
  "pieces": [
    {
      "shape": "tshape",
      "start": [
        1,
        5
      ],
      "goal": [
        6,
        2
      ]
    }
  ]
}