Requires:

{
  "or": [
    "SpaceJump",
    {
      "and": [
        "Grapple",
        {
          "obstaclesNotCleared": [
            "B"
          ]
        }
      ]
    }
  ]
}

Dev note: It is possible to use one set of the Grapple blocks in G-Mode. Generally the second moat is harder to cross so the logic is only allowing it there. FIXME: It may be possible to cross the whole room with Grapple in G-Mode, but it would be very hard.