River Crossing River Explorers Easy — Set 34

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{
    "title": "Easy River Crossing Puzzle #34",
    "scenario": "The Explorers",
    "narrative": "Three explorers must cross a crocodile-infested river with their backpacks. The raft holds at most 2 items total (people + packs). Each explorer must keep their own backpack with them at all times.",
    "entities": [
        {
            "id": "e1",
            "name": "Explorer 1",
            "icon": "🧭"
        },
        {
            "id": "e2",
            "name": "Explorer 2",
            "icon": "🧭"
        },
        {
            "id": "e3",
            "name": "Explorer 3",
            "icon": "🧭"
        },
        {
            "id": "b1",
            "name": "Backpack A",
            "icon": "🎒"
        },
        {
            "id": "b2",
            "name": "Backpack B",
            "icon": "🎒"
        },
        {
            "id": "b3",
            "name": "Backpack C",
            "icon": "🎒"
        }
    ],
    "boatCapacity": 2,
    "constraints": [
        "The raft holds at most 2 items (person + pack count as separate items).",
        "An explorer's backpack must always travel with its owner.",
        "At least one explorer must operate the raft each crossing."
    ],
    "question": "Describe a valid sequence of crossings that gets everyone to the other side without violating any constraint. What is the minimum number of trips required?",
    "solution": [
        {
            "trip": 1,
            "direction": "→",
            "carrying": [
                "E1+Pack A"
            ],
            "leftBank": "E2,E3,B,C",
            "rightBank": "E1,A",
            "note": "Explorer 1 crosses with pack."
        },
        {
            "trip": 2,
            "direction": "←",
            "carrying": [
                "E1"
            ],
            "leftBank": "E1,E2,E3,B,C",
            "rightBank": "A",
            "note": "E1 returns (pack stays)."
        },
        {
            "trip": 3,
            "direction": "→",
            "carrying": [
                "E2+Pack B"
            ],
            "leftBank": "E1,E3,C",
            "rightBank": "E2,A,B",
            "note": "Explorer 2 crosses with pack."
        },
        {
            "trip": 4,
            "direction": "←",
            "carrying": [
                "E2"
            ],
            "leftBank": "E1,E2,E3,C",
            "rightBank": "A,B",
            "note": "E2 returns."
        },
        {
            "trip": 5,
            "direction": "→",
            "carrying": [
                "E3+Pack C"
            ],
            "leftBank": "E1,E2",
            "rightBank": "E3,A,B,C",
            "note": "Explorer 3 crosses with pack."
        },
        {
            "trip": 6,
            "direction": "←",
            "carrying": [
                "E3"
            ],
            "leftBank": "E1,E2,E3",
            "rightBank": "A,B,C",
            "note": "E3 returns."
        },
        {
            "trip": 7,
            "direction": "→",
            "carrying": [
                "E1",
                "E2"
            ],
            "leftBank": "E3",
            "rightBank": "E1,E2,A,B,C",
            "note": "E1 and E2 cross."
        },
        {
            "trip": 8,
            "direction": "←",
            "carrying": [
                "E1"
            ],
            "leftBank": "E1,E3",
            "rightBank": "E2,A,B,C",
            "note": "E1 returns for E3."
        },
        {
            "trip": 9,
            "direction": "→",
            "carrying": [
                "E1",
                "E3"
            ],
            "leftBank": "",
            "rightBank": "All",
            "note": "All across. Done!"
        }
    ],
    "minimumTrips": 9,
    "hint": "The first 3 move(s) of the solution are shown below to help you start.",
    "partialSolutionHint": [
        {
            "trip": 1,
            "direction": "→",
            "carrying": [
                "E1+Pack A"
            ],
            "leftBank": "E2,E3,B,C",
            "rightBank": "E1,A",
            "note": "Explorer 1 crosses with pack."
        },
        {
            "trip": 2,
            "direction": "←",
            "carrying": [
                "E1"
            ],
            "leftBank": "E1,E2,E3,B,C",
            "rightBank": "A",
            "note": "E1 returns (pack stays)."
        },
        {
            "trip": 3,
            "direction": "→",
            "carrying": [
                "E2+Pack B"
            ],
            "leftBank": "E1,E3,C",
            "rightBank": "E2,A,B",
            "note": "Explorer 2 crosses with pack."
        }
    ],
    "_archetype": null,
    "_generatorId": null
}