Requires:

{
  "or": [
    {
      "getBlueSpeed": {
        "usedTiles": 14,
        "openEnd": 0
      }
    },
    {
      "and": [
        {
          "getBlueSpeed": {
            "usedTiles": 15,
            "openEnd": 0
          }
        },
        {
          "doorUnlockedAtNode": 2
        }
      ]
    }
  ]
}

Clears obstacles: A, B