{
 "id": "B12-A",
 "counterpart": "B12-B",
 "genre": "board_game",
 "interaction_family": "trigger_mechanism",
 "initial_scene": {
  "description": "a game parlor with a large wooden board on the table, a brass central dial on the board, the middle strip of the board bare flat polished wood, and the board corner also bare flat polished wood a single player seen in third person from behind, standing at the table with a hand on the central dial",
  "third_person_player": true,
  "player_pose_and_item": "a single player seen in third person from behind, standing at the table with a hand on the central dial",
  "action_target": "the large central dial",
  "other_key_objects": [
   "game_board",
   "central_dial",
   "board_bridge",
   "corner_tower"
  ],
  "shared_visual_state": [
   "the middle strip of the board is bare flat polished wood with nothing built on it",
   "the board corner is bare flat polished wood with nothing built on it"
  ],
  "camera": "locked third-person, fixed framing",
  "style": "stylized 3D third-person adventure game environment, clean uncluttered composition, readable silhouettes, medium-wide fixed gameplay camera, soft cool-neutral ambient lighting, restrained materials, no HUD, no subtitles, no readable text",
  "keyframe": "frames/B12.png"
 },
 "hidden_state": {
  "variable": "board_mode",
  "A": "BRIDGE",
  "B": "TOWER",
  "visible_in_initial_frame": false
 },
 "rule": {
  "text": "If the board_mode is BRIDGE, the bridge rises up over the board; if it is TOWER, a tall tower rises from the board corner.",
  "precondition": "board_mode == 'BRIDGE'",
  "effect": "bridge.up = true",
  "else_effect": "tower.up = true",
  "mapping": {
   "BRIDGE": "bridge.up = true",
   "TOWER": "tower.up = true"
  }
 },
 "shared_action": "The large central board dial clearly rotates by about half a turn.",
 "instruction": "Preserve the first frame. board_mode = BRIDGE, so the resolved rule is: the bridge rises up over the board. Action: The large central board dial clearly rotates by about half a turn. Show the action, then exactly this consequence: the bridge rises up over the board The counter-outcome must NOT happen at any point: a tall tower rises from the board corner. Instead, the board corner is bare flat polished wood with nothing built on it throughout the clip. Hold the final state for about the last second. One continuous 3-second third-person clip, fixed camera, no HUD, no subtitles, no readable text.",
 "initial_state": {
  "bridge": {
   "up": false
  },
  "tower": {
   "up": false
  },
  "board_mode": "BRIDGE"
 },
 "gold_end_state": {
  "bridge.up": true,
  "tower.up": false
 },
 "delta": {
  "bridge.up": true
 },
 "visual_vocab": {
  "bridge.up": {
   "false": "the middle strip of the board is bare flat polished wood with nothing built on it",
   "true": "the board bridge rises up over the board"
  },
  "tower.up": {
   "false": "the board corner is bare flat polished wood with nothing built on it",
   "true": "a tall tower rises from the board corner"
  }
 },
 "gold_A": "the bridge rises up over the board",
 "gold_B": "a tall tower rises from the board corner",
 "terminal_visual_states": {
  "occurs": {
   "variable": "bridge.up",
   "value": true,
   "phrase": "the board bridge rises up over the board",
   "judge_label": "the bridge rises",
   "in_final_frame": true
  },
  "not_occurs": {
   "variable": "tower.up",
   "value": true,
   "phrase": "a tall tower rises from the board corner",
   "judge_label": "the tower rises",
   "in_final_frame": false,
   "instead_remains": "the board corner is bare flat polished wood with nothing built on it"
  }
 },
 "prompt_ok": [
  "BRIDGE",
  "TOWER"
 ],
 "judge": {
  "initial_questions": [
   {
    "question": "Is it true that the player stands with a hand on the board dial?",
    "statement": "the player stands with a hand on the board dial",
    "answers": [
     "yes",
     "no"
    ],
    "expected": "yes"
   },
   {
    "question": "Is it true that the board middle and corner are both bare flat wood with nothing built?",
    "statement": "the board middle and corner are both bare flat wood with nothing built",
    "answers": [
     "yes",
     "no"
    ],
    "expected": "yes"
   }
  ],
  "action_question": {
   "question": "Did the central dial clearly rotate?",
   "answers": [
    "yes",
    "no"
   ],
   "expected": "yes"
  },
  "outcome_question": {
   "question": "At the end, does the bridge rise, or the corner tower?",
   "answers": [
    "the bridge rises",
    "the tower rises",
    "unclear"
   ],
   "expected": "the bridge rises",
   "not_expected": "the tower rises"
  }
 },
 "constraints": {
  "identical_initial_frame": true,
  "hidden_state_not_visually_leaked": true,
  "same_action_across_twins": true,
  "both_outcomes_change": true,
  "one_action_per_chunk": true,
  "duration_seconds": "2-5"
 },
 "input_image": "input.png"
}