TRACE · ROUND 5

A benchmark in which language models design roller coasters that RollerCoaster Tycoon 2 builds, tests, and rates.

claude-fable-5 · 20260803-fable5-design-full · round 5 back to model →
events
69
tool calls
62
rejected
2
session
0:00
Session trace

  1. I'll load the coaster tools and plan a build that improves on last round's 7.70 excitement.

  2. ToolSearch
    {"max_results":15,"query":"+coaster"}

  3. I'll start by replaying last round's proven 205-piece layout (excitement 7.70, intensity 9.75) to bank a baseline quickly, then iterate to beat it.

  4. new_ride
    {"dir":0,"ride_type":51,"x":58,"y":40}
    {"cursor":{"bank":0,"dir":0,"slope":0,"x":58,"y":40,"z":112},"ride_id":0}
  5. place_piecesrejected
    {"pieces":["begin_station","middle_station","middle_station","end_station",{"chain":true,"t":"flat_to_up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25_to_flat"},"flat_to_down_60","down_60","down_60","down_60","down_60_to_down_25","down_25_to_flat","flat_to_up_25","half_loop_up","left_corkscrew_down","flat_to_down_25","down_25","down_25","down_25","down_25","down_25_to_flat",{"speed":27,"t":"brakes"},"flat_to_right_bank","banked_right_turn_3","right_bank_to_flat","flat_to_up_25","up_25","up_25_to_flat","flat_to_down_25","down_25","down_25_to_flat",{"speed":26,"t":"brakes"},"flat_to_up_25","left_vertical_loop","down_25_to_flat",{"speed":25,"t":"booster"},"flat_to_up_25","right_vertical_loop","down_25_to_flat",{"speed":26,"t":"booster"},"flat_to_up_25","up_25_to_flat","flat_to_down_25","down_25_to_flat"… (3504 chars)
    pieces array too large (204 > 200 max)
  6. place_pieces
    {"pieces":["begin_station","middle_station","middle_station","end_station",{"chain":true,"t":"flat_to_up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25_to_flat"},"flat_to_down_60","down_60","down_60","down_60","down_60_to_down_25","down_25_to_flat","flat_to_up_25","half_loop_up","left_corkscrew_down","flat_to_down_25","down_25","down_25","down_25","down_25","down_25_to_flat",{"speed":27,"t":"brakes"},"flat_to_right_bank","banked_right_turn_3","right_bank_to_flat","flat_to_up_25","up_25","up_25_to_flat","flat_to_down_25","down_25","down_25_to_flat",{"speed":26,"t":"brakes"},"flat_to_up_25","left_vertical_loop","down_25_to_flat",{"speed":25,"t":"booster"},"flat_to_up_25","right_vertical_loop","down_25_to_flat",{"speed":26,"t":"booster"},"flat_to_up_25","up_25_to_flat","flat_to_down_25","down_25_to_flat"… (2869 chars)
    {"circuit_closed":false,"cursor":{"bank":0,"dir":2,"slope":0,"x":45,"y":23,"z":112},"placed_this_call":157,"total_placed":157}
  7. place_pieces
    {"pieces":[{"speed":27,"t":"booster"},"flat_to_up_25","up_25","up_25_to_flat","flat_to_down_25","down_25","down_25_to_flat",{"speed":26,"t":"booster"},"flat_to_up_25","up_25_to_flat","flat_to_down_25","down_25_to_flat","flat","flat",{"speed":20,"t":"brakes"},"flat","flat_to_up_25","up_25","up_25_to_flat","flat","flat","flat","flat_to_left_bank","banked_left_turn_3","left_bank_to_flat","flat","flat","flat","flat","flat","flat",{"speed":25,"t":"booster"},"flat","flat","flat","flat","flat","flat_to_left_bank","banked_left_turn_3","left_bank_to_flat","flat","flat","flat","flat_to_down_25","down_25","down_25_to_flat",{"speed":13,"t":"brakes"},{"speed":9,"t":"brakes"}]}
    {"circuit_closed":true,"cursor":{"bank":0,"dir":0,"slope":0,"x":58,"y":40,"z":112},"placed_this_call":48,"total_placed":205}

  8. Circuit closed with the full replay. Testing to bank the baseline.

  9. finish_and_test
    {"bounds":{"max_tile_x":69,"max_tile_y":52,"max_z":392,"min_tile_x":28,"min_tile_y":20,"min_z":112},"placed_pieces":["begin_station","middle_station","middle_station","end_station",{"chain":true,"t":"flat_to_up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25_to_flat"},"flat_to_down_60","down_60","down_60","down_60","down_60_to_down_25","down_25_to_flat","flat_to_up_25","half_loop_up","left_corkscrew_down","flat_to_down_25","down_25","down_25","down_25","down_25","down_25_to_flat",{"speed":27,"t":"brakes"},"flat_to_right_bank","banked_right_turn_3","right_bank_to_flat","flat_to_up_25","up_25","up_25_to_flat","flat_to_down_25","down_25","down_25_to_flat",{"speed":26,"t":"brakes"},"flat_to_up_25","left_vertical_loop","down_25_to_flat",{"speed":25,"t":"booster"},"flat_to_up_25","right_vertical_loop","down_… (4433 chars)
  10. piece_geometry
    {"dir":0}
    {"deltas":[{"bank_out":0,"dir_out":0,"dx_tiles":-1,"dy_tiles":0,"dz":0,"piece":"flat","slope_out":0},{"bank_out":0,"dir_out":0,"dx_tiles":-1,"dy_tiles":0,"dz":0,"piece":"end_station","slope_out":0},{"bank_out":0,"dir_out":0,"dx_tiles":-1,"dy_tiles":0,"dz":0,"piece":"begin_station","slope_out":0},{"bank_out":0,"dir_out":0,"dx_tiles":-1,"dy_tiles":0,"dz":0,"piece":"middle_station","slope_out":0},{"bank_out":0,"dir_out":0,"dx_tiles":-1,"dy_tiles":0,"dz":16,"piece":"up_25","slope_out":2},{"bank_out":0,"dir_out":0,"dx_tiles":-1,"dy_tiles":0,"dz":64,"piece":"up_60","slope_out":4},{"bank_out":0,"dir_out":0,"dx_tiles":-1,"dy_tiles":0,"dz":8,"piece":"flat_to_up_25","slope_out":2},{"bank_out":0,"dir_out":0,"dx_tiles":-1,"dy_tiles":0,"dz":32,"piece":"up_25_to_up_60","slope_out":4},{"bank_out":0,"dir_out":0,"dx_tiles":-1,"dy_tiles":0,"dz":32,"piece":"up_60_to_up_25","slope_out":2},{"bank_out":0,"dir_out":0,"dx_tiles":-1,"dy_tiles":0,"dz":8,"piece":"up_25_to_flat","slope_out":0},{"bank_out":0,"dir_out":0,"dx_tiles":-1,"dy_tiles":0,"dz":-16,"piece":"down_25","slope_out":6},{"bank_out":0,"dir_out":0,"dx_tiles":-1,"dy_tiles":0,"dz":-64,"piece":"down_60","slope_out":8},{"bank_out":0,"dir_out":0,"dx… (7397 chars)
  11. demolish
    {"demolished":0}
  12. new_ride
    {"dir":0,"ride_type":51,"x":58,"y":40}
    {"cursor":{"bank":0,"dir":0,"slope":0,"x":58,"y":40,"z":112},"ride_id":0}
  13. place_pieces
    {"pieces":["begin_station","middle_station","middle_station","end_station",{"chain":true,"t":"flat_to_up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25_to_flat"},"flat_to_down_60","down_60","down_60","down_60","down_60_to_down_25","down_25_to_flat","flat_to_up_25","half_loop_up","left_corkscrew_down","flat_to_down_25","down_25","down_25","down_25","down_25","down_25_to_flat",{"speed":25,"t":"brakes"},"flat_to_right_bank","banked_right_turn_3","right_bank_to_flat","flat_to_up_25","up_25","up_25_to_flat","flat_to_down_25","down_25","down_25_to_flat",{"speed":26,"t":"brakes"},"flat_to_up_25","left_vertical_loop","down_25_to_flat",{"speed":25,"t":"booster"},"flat_to_up_25","right_vertical_loop","down_25_to_flat",{"speed":26,"t":"booster"},"flat_to_up_25","up_25_to_flat","flat_to_down_25","down_25_to_flat"… (2869 chars)
    {"circuit_closed":false,"cursor":{"bank":0,"dir":2,"slope":0,"x":45,"y":23,"z":112},"placed_this_call":157,"total_placed":157}
  14. place_pieces
    {"pieces":[{"speed":27,"t":"booster"},"flat_to_up_25","up_25","up_25_to_flat","flat_to_down_25","down_25","down_25_to_flat",{"speed":26,"t":"booster"},"flat_to_up_25","up_25_to_flat","flat_to_down_25","down_25_to_flat","flat","flat",{"speed":20,"t":"brakes"},"flat","flat_to_up_25","up_25","up_25_to_flat","flat","flat","flat","flat_to_left_bank","banked_left_turn_3","left_bank_to_flat",{"speed":25,"t":"booster"},"flat_to_up_25","left_vertical_loop","down_25_to_flat",{"speed":25,"t":"booster"},"flat_to_up_25","right_vertical_loop","down_25_to_flat",{"speed":20,"t":"brakes"},"flat","flat_to_left_bank","banked_left_turn_3","left_bank_to_flat","flat","flat","flat","flat_to_down_25","down_25","down_25_to_flat",{"speed":13,"t":"brakes"},{"speed":9,"t":"brakes"}]}
    {"circuit_closed":true,"cursor":{"bank":0,"dir":0,"slope":0,"x":58,"y":40,"z":112},"placed_this_call":46,"total_placed":203}

  15. Circuit closed with 7 inversions. Testing.

  16. finish_and_test
    {"bounds":{"max_tile_x":69,"max_tile_y":52,"max_z":392,"min_tile_x":28,"min_tile_y":20,"min_z":112},"placed_pieces":["begin_station","middle_station","middle_station","end_station",{"chain":true,"t":"flat_to_up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25_to_flat"},"flat_to_down_60","down_60","down_60","down_60","down_60_to_down_25","down_25_to_flat","flat_to_up_25","half_loop_up","left_corkscrew_down","flat_to_down_25","down_25","down_25","down_25","down_25","down_25_to_flat",{"speed":25,"t":"brakes"},"flat_to_right_bank","banked_right_turn_3","right_bank_to_flat","flat_to_up_25","up_25","up_25_to_flat","flat_to_down_25","down_25","down_25_to_flat",{"speed":26,"t":"brakes"},"flat_to_up_25","left_vertical_loop","down_25_to_flat",{"speed":25,"t":"booster"},"flat_to_up_25","right_vertical_loop","down_… (4526 chars)
  17. demolish
    {"demolished":0}
  18. new_ride
    {"dir":0,"ride_type":51,"x":58,"y":40}
    {"cursor":{"bank":0,"dir":0,"slope":0,"x":58,"y":40,"z":112},"ride_id":0}
  19. place_pieces
    {"pieces":["begin_station","middle_station","middle_station","end_station",{"chain":true,"t":"flat_to_up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25_to_flat"},"flat_to_down_60","down_60","down_60","down_60_to_down_25","down_25_to_flat","flat","flat","flat","flat","flat","flat_to_up_25","half_loop_up","left_corkscrew_down","flat_to_down_25","down_25","down_25","down_25","down_25","down_25_to_flat",{"speed":25,"t":"brakes"},"flat_to_right_bank","banked_right_turn_3","right_bank_to_flat","flat_to_up_25","up_25","up_25_to_flat","flat_to_down_25","down_25","down_25_to_flat",{"speed":26,"t":"brakes"},"flat_to_up_25","left_vertical_loop","down_25_to_flat",{"speed":25,"t":"booster"},"flat_to_up_25","right_vertical_loop","down_25_to_flat",{"speed":26,"t":"booster"},"flat_to_up_25","up_25_to_flat","flat_to_down_25","down_25_to_flat",{"speed":19,"t":"brakes"},"s_bend_right","s_bend_left",… (2733 chars)
    {"circuit_closed":false,"cursor":{"bank":0,"dir":2,"slope":0,"x":44,"y":23,"z":128},"placed_this_call":158,"total_placed":158}
  20. place_pieces
    {"pieces":["flat",{"speed":27,"t":"booster"},"flat_to_up_25","up_25","up_25_to_flat","flat_to_down_25","down_25","down_25_to_flat",{"speed":26,"t":"booster"},"flat_to_up_25","up_25_to_flat","flat_to_down_25","down_25_to_flat","flat","flat",{"speed":20,"t":"brakes"},"flat","flat_to_up_25","up_25","up_25_to_flat","flat","flat","flat","flat_to_left_bank","banked_left_turn_3","left_bank_to_flat",{"speed":25,"t":"booster"},"flat_to_up_25","left_vertical_loop","down_25_to_flat",{"speed":25,"t":"booster"},"flat_to_up_25","right_vertical_loop","down_25_to_flat",{"speed":20,"t":"brakes"},"flat","flat_to_left_bank","banked_left_turn_3","left_bank_to_flat","flat","flat","flat_to_down_25","down_25","down_25","down_25_to_flat",{"speed":13,"t":"brakes"},{"speed":9,"t":"brakes"}]}
    {"circuit_closed":false,"cursor":{"bank":0,"dir":0,"slope":6,"x":63,"y":40,"z":152},"placed_this_call":42,"rejection":{"error":"Twister Roller Coaster 1 in the way","index":42,"piece":"down_25"},"total_placed":200}
  21. undo_piece
    {"cursor":{"bank":0,"dir":0,"slope":0,"x":64,"y":40,"z":160},"pieces_placed":199,"removed":"flat_to_down_25"}
  22. undo_piece
    {"cursor":{"bank":0,"dir":0,"slope":0,"x":65,"y":40,"z":160},"pieces_placed":198,"removed":"flat"}
  23. undo_piece
    {"cursor":{"bank":0,"dir":0,"slope":0,"x":66,"y":40,"z":160},"pieces_placed":197,"removed":"flat"}
  24. place_pieces
    {"pieces":[{"speed":13,"t":"brakes"},{"speed":9,"t":"brakes"},"flat","flat","flat_to_down_25","down_25","down_25","down_25_to_flat"]}
    {"circuit_closed":true,"cursor":{"bank":0,"dir":0,"slope":0,"x":58,"y":40,"z":112},"placed_this_call":8,"total_placed":205}

  25. Circuit closed. Testing variant C (7 inversions, shorter first drop).

  26. finish_and_test
    {"bounds":{"max_tile_x":69,"max_tile_y":52,"max_z":344,"min_tile_x":27,"min_tile_y":20,"min_z":112},"placed_pieces":["begin_station","middle_station","middle_station","end_station",{"chain":true,"t":"flat_to_up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25_to_flat"},"flat_to_down_60","down_60","down_60","down_60_to_down_25","down_25_to_flat","flat","flat","flat","flat","flat","flat_to_up_25","half_loop_up","left_corkscrew_down","flat_to_down_25","down_25","down_25","down_25","down_25","down_25_to_flat",{"speed":25,"t":"brakes"},"flat_to_right_bank","banked_right_turn_3","right_bank_to_flat","flat_to_up_25","up_25","up_25_to_flat","flat_to_down_25","down_25","down_25_to_flat",{"speed":26,"t":"brakes"},"flat_to_up_25","left_vertical_loop","down_25_to_flat",{"speed":25,"t":"booster"},"flat_to_up_25","right_vertical_loop","down_25_to_flat",{"speed":26,"t":"booster"},"flat_to_up_25","… (4412 chars)
  27. demolish
    {"demolished":0}
  28. new_ride
    {"dir":0,"ride_type":51,"x":58,"y":40}
    {"cursor":{"bank":0,"dir":0,"slope":0,"x":58,"y":40,"z":112},"ride_id":0}
  29. place_piecesrejected
    {"pieces":["begin_station","middle_station","middle_station","end_station",{"chain":true,"t":"flat_to_up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25_to_flat"},"flat_to_down_60","down_60","down_60","down_60_to_down_25","down_25_to_flat","flat","flat","flat","flat","flat","flat_to_up_25","half_loop_up","left_corkscrew_down","flat_to_down_25","down_25","down_25","down_25","down_25","down_25_to_flat",{"speed":25,"t":"brakes"},"flat_to_right_bank","banked_right_turn_3","right_bank_to_flat","flat_to_up_25","up_25","up_25_to_flat","flat_to_down_25","down_25","down_25_to_flat",{"speed":26,"t":"brakes"},"flat_to_up_25","left_vertical_loop","down_25_to_flat",{"speed":25,"t":"booster"},"flat_to_up_25","right_vertical_loop","down_25_to_flat",{"speed":26,"t":"booster"},"flat_to_up_25","up_25_to_flat","flat_to_down_25","down_25_to_flat",{"speed":18,"t":"brakes"},"s_bend_right","s_bend_left",… (3417 chars)
    pieces array too large (205 > 200 max)
  30. place_pieces
    {"pieces":["begin_station","middle_station","middle_station","end_station",{"chain":true,"t":"flat_to_up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25_to_flat"},"flat_to_down_60","down_60","down_60","down_60_to_down_25","down_25_to_flat","flat","flat","flat","flat","flat","flat_to_up_25","half_loop_up","left_corkscrew_down","flat_to_down_25","down_25","down_25","down_25","down_25","down_25_to_flat",{"speed":25,"t":"brakes"},"flat_to_right_bank","banked_right_turn_3","right_bank_to_flat","flat_to_up_25","up_25","up_25_to_flat","flat_to_down_25","down_25","down_25_to_flat",{"speed":26,"t":"brakes"},"flat_to_up_25","left_vertical_loop","down_25_to_flat",{"speed":25,"t":"booster"},"flat_to_up_25","right_vertical_loop","down_25_to_flat",{"speed":26,"t":"booster"},"flat_to_up_25","up_25_to_flat","flat_to_down_25","down_25_to_flat",{"speed":18,"t":"brakes"},"s_bend_right","s_bend_left",… (3296 chars)
    {"circuit_closed":false,"cursor":{"bank":0,"dir":0,"slope":0,"x":66,"y":40,"z":160},"placed_this_call":197,"total_placed":197}
  31. place_pieces
    {"pieces":[{"speed":13,"t":"brakes"},{"speed":9,"t":"brakes"},"flat","flat","flat_to_down_25","down_25","down_25","down_25_to_flat"]}
    {"circuit_closed":true,"cursor":{"bank":0,"dir":0,"slope":0,"x":58,"y":40,"z":112},"placed_this_call":8,"total_placed":205}
  32. finish_and_test
    {"bounds":{"max_tile_x":69,"max_tile_y":52,"max_z":344,"min_tile_x":27,"min_tile_y":20,"min_z":112},"placed_pieces":["begin_station","middle_station","middle_station","end_station",{"chain":true,"t":"flat_to_up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25_to_flat"},"flat_to_down_60","down_60","down_60","down_60_to_down_25","down_25_to_flat","flat","flat","flat","flat","flat","flat_to_up_25","half_loop_up","left_corkscrew_down","flat_to_down_25","down_25","down_25","down_25","down_25","down_25_to_flat",{"speed":25,"t":"brakes"},"flat_to_right_bank","banked_right_turn_3","right_bank_to_flat","flat_to_up_25","up_25","up_25_to_flat","flat_to_down_25","down_25","down_25_to_flat",{"speed":26,"t":"brakes"},"flat_to_up_25","left_vertical_loop","down_25_to_flat",{"speed":25,"t":"booster"},"flat_to_up_25","right_vertical_loop","down_25_to_flat",{"speed":26,"t":"booster"},"flat_to_up_25","… (4334 chars)
  33. demolish
    {"demolished":0}
  34. new_ride
    {"dir":0,"ride_type":51,"x":58,"y":40}
    {"cursor":{"bank":0,"dir":0,"slope":0,"x":58,"y":40,"z":112},"ride_id":0}
  35. place_pieces
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    {"circuit_closed":false,"cursor":{"bank":0,"dir":2,"slope":0,"x":45,"y":23,"z":112},"placed_this_call":157,"total_placed":157}
  36. place_pieces
    {"pieces":[{"speed":27,"t":"booster"},"flat_to_up_25","up_25","up_25_to_flat","flat_to_down_25","down_25","down_25_to_flat",{"speed":26,"t":"booster"},"flat_to_up_25","up_25_to_flat","flat_to_down_25","down_25_to_flat","flat","flat",{"speed":20,"t":"brakes"},"flat","flat_to_up_25","up_25","up_25_to_flat","flat","flat","flat","flat_to_left_bank","banked_left_turn_3","left_bank_to_flat","flat","flat","flat","flat",{"speed":25,"t":"booster"},"flat_to_right_bank","right_helix_up_small","right_helix_up_small","right_helix_down_small","right_helix_down_small","right_bank_to_flat","flat","flat","flat","flat","flat","flat_to_left_bank","banked_left_turn_3","left_bank_to_flat","flat","flat","flat","flat_to_down_25","down_25","down_25_to_flat",{"speed":13,"t":"brakes"},{"speed":9,"t":"brakes"}]}
    {"circuit_closed":false,"cursor":{"bank":4,"dir":1,"slope":0,"x":69,"y":32,"z":176},"placed_this_call":33,"rejection":{"error":"Twister Roller Coaster 1 in the way","index":33,"piece":"right_helix_down_small"},"total_placed":190}
  37. undo_piece
    {"cursor":{"bank":4,"dir":3,"slope":0,"x":72,"y":31,"z":160},"pieces_placed":189,"removed":"right_helix_up_small"}
  38. get_state
    {"circuit_closed":false,"cursor":{"bank":4,"dir":3,"slope":0,"x":72,"y":31,"z":160},"finalized":false,"pieces_placed":189,"placed_pieces":["begin_station","middle_station","middle_station","end_station",{"chain":true,"t":"flat_to_up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25_to_flat"},"flat_to_down_60","down_60","down_60","down_60","down_60_to_down_25","down_25_to_flat","flat_to_up_25","half_loop_up","left_corkscrew_down","flat_to_down_25","down_25","down_25","down_25","down_25","down_25_to_flat",{"speed":26,"t":"brakes"},"flat_to_right_bank","banked_right_turn_3","right_bank_to_flat","flat_to_up_25","up_25","up_25_to_flat","flat_to_down_25","down_25","down_25_to_flat",{"speed":26,"t":"brakes"},"flat_to_up_25","left_vertical_loop","down_25_to_flat",{"speed":25,"t":"booster"},"flat_to_up_25","right… (3564 chars)
  39. place_pieces
    {"pieces":["right_helix_up_small","right_bank","right_bank","right_bank","right_bank","right_helix_down_small","right_helix_down_small","right_bank_to_flat","flat","flat_to_left_bank","banked_left_turn_3","left_bank_to_flat","flat","flat","flat","flat_to_down_25","down_25","down_25_to_flat",{"speed":13,"t":"brakes"},{"speed":9,"t":"brakes"}]}
    {"circuit_closed":true,"cursor":{"bank":0,"dir":0,"slope":0,"x":58,"y":40,"z":112},"placed_this_call":20,"total_placed":209}
  40. finish_and_test
    {"bounds":{"max_tile_x":72,"max_tile_y":52,"max_z":392,"min_tile_x":28,"min_tile_y":20,"min_z":112},"placed_pieces":["begin_station","middle_station","middle_station","end_station",{"chain":true,"t":"flat_to_up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25_to_flat"},"flat_to_down_60","down_60","down_60","down_60","down_60_to_down_25","down_25_to_flat","flat_to_up_25","half_loop_up","left_corkscrew_down","flat_to_down_25","down_25","down_25","down_25","down_25","down_25_to_flat",{"speed":26,"t":"brakes"},"flat_to_right_bank","banked_right_turn_3","right_bank_to_flat","flat_to_up_25","up_25","up_25_to_flat","flat_to_down_25","down_25","down_25_to_flat",{"speed":26,"t":"brakes"},"flat_to_up_25","left_vertical_loop","down_25_to_flat",{"speed":25,"t":"booster"},"flat_to_up_25","right_vertical_loop","down_… (4594 chars)
  41. demolish
    {"demolished":0}
  42. new_ride
    {"dir":0,"ride_type":51,"x":58,"y":40}
    {"cursor":{"bank":0,"dir":0,"slope":0,"x":58,"y":40,"z":112},"ride_id":0}
  43. place_pieces
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    {"circuit_closed":false,"cursor":{"bank":0,"dir":2,"slope":0,"x":45,"y":23,"z":112},"placed_this_call":157,"total_placed":157}
  44. place_pieces
    {"pieces":[{"speed":27,"t":"booster"},"flat_to_up_25","up_25","up_25_to_flat","flat_to_down_25","down_25","down_25_to_flat",{"speed":26,"t":"booster"},"flat_to_up_25","up_25_to_flat","flat_to_down_25","down_25_to_flat","flat_to_up_25","up_25_to_flat","flat_to_down_25","down_25_to_flat","flat_to_up_25","up_25","up_25_to_flat","flat","flat","flat","flat_to_left_bank","banked_left_turn_3","left_bank_to_flat","flat","flat","flat","flat",{"speed":25,"t":"booster"},"flat_to_right_bank","right_helix_up_small","right_helix_up_small","right_bank","right_bank","right_bank","right_bank","right_helix_down_small","right_helix_down_small","right_bank_to_flat","flat","flat_to_left_bank","banked_left_turn_3","left_bank_to_flat","flat","flat","flat","flat_to_down_25","down_25","down_25_to_flat",{"speed":13,"t":"brakes"},{"speed":9,"t":"brakes"}]}
    {"circuit_closed":true,"cursor":{"bank":0,"dir":0,"slope":0,"x":58,"y":40,"z":112},"placed_this_call":52,"total_placed":209}
  45. finish_and_test
    {"bounds":{"max_tile_x":72,"max_tile_y":52,"max_z":392,"min_tile_x":28,"min_tile_y":20,"min_z":112},"placed_pieces":["begin_station","middle_station","middle_station","end_station",{"chain":true,"t":"flat_to_up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25_to_flat"},"flat_to_down_60","down_60","down_60","down_60","down_60_to_down_25","down_25_to_flat","flat_to_up_25","half_loop_up","left_corkscrew_down","flat_to_down_25","down_25","down_25","down_25","down_25","down_25_to_flat",{"speed":26,"t":"brakes"},"flat_to_right_bank","banked_right_turn_3","right_bank_to_flat","flat_to_up_25","up_25","up_25_to_flat","flat_to_down_25","down_25","down_25_to_flat",{"speed":26,"t":"brakes"},"flat_to_up_25","left_vertical_loop","down_25_to_flat",{"speed":25,"t":"booster"},"flat_to_up_25","right_vertical_loop","down_… (4615 chars)
  46. demolish
    {"demolished":0}
  47. new_ride
    {"dir":0,"ride_type":51,"x":58,"y":40}
    {"cursor":{"bank":0,"dir":0,"slope":0,"x":58,"y":40,"z":112},"ride_id":0}
  48. place_pieces
    {"pieces":["begin_station","middle_station","middle_station","end_station",{"chain":true,"t":"flat_to_up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25_to_flat"},"flat_to_down_60","down_60","down_60","down_60","down_60_to_down_25","down_25_to_flat","flat_to_up_25","half_loop_up","left_corkscrew_down","flat_to_down_25","down_25","down_25","down_25","down_25","down_25_to_flat",{"speed":25,"t":"brakes"},"flat_to_right_bank","banked_right_turn_3","right_bank_to_flat","flat_to_up_25","up_25","up_25_to_flat","flat_to_down_25","down_25","down_25_to_flat",{"speed":26,"t":"brakes"},"flat_to_up_25","left_vertical_loop","down_25_to_flat",{"speed":25,"t":"booster"},"flat_to_up_25","right_vertical_loop","down_25_to_flat",{"speed":26,"t":"booster"},"flat_to_up_25","up_25_to_flat","flat_to_down_25","down_25_to_flat"… (3037 chars)
    {"circuit_closed":false,"cursor":{"bank":4,"dir":1,"slope":0,"x":61,"y":32,"z":128},"placed_this_call":125,"rejection":{"error":"Twister Roller Coaster 1 in the way","index":125,"piece":"right_helix_up_small"},"total_placed":125}
  49. undo_piece
    {"cursor":{"bank":4,"dir":3,"slope":0,"x":64,"y":31,"z":112},"pieces_placed":124,"removed":"right_helix_up_small"}
  50. undo_piece
    {"cursor":{"bank":0,"dir":3,"slope":0,"x":64,"y":32,"z":112},"pieces_placed":123,"removed":"flat_to_right_bank"}
  51. place_pieces
    {"pieces":["flat_to_left_bank","left_helix_up_small","left_helix_up_small","left_bank","left_bank","left_bank","left_bank","left_helix_down_small","left_helix_down_small","left_bank_to_flat","flat","flat","flat","flat","flat_to_right_bank","banked_right_turn_3","right_bank_to_flat",{"speed":28,"t":"booster"},"flat_to_up_25","up_25","up_25_to_flat","flat_to_down_25","down_25","down_25_to_flat",{"speed":28,"t":"booster"},"flat_to_up_25","up_25_to_flat","flat_to_down_25","down_25_to_flat","flat_to_up_25","up_25_to_flat","flat_to_down_25","down_25_to_flat",{"speed":19,"t":"brakes"},"flat_to_right_bank","banked_right_turn_3","banked_right_turn_3","right_bank_to_flat"]}
    {"circuit_closed":false,"cursor":{"bank":0,"dir":2,"slope":0,"x":45,"y":23,"z":112},"placed_this_call":38,"total_placed":161}

  52. Left helix worked and the cursor matches the known closure point. Placing the same tail as variant D.

  53. place_pieces
    {"pieces":[{"speed":27,"t":"booster"},"flat_to_up_25","up_25","up_25_to_flat","flat_to_down_25","down_25","down_25_to_flat",{"speed":26,"t":"booster"},"flat_to_up_25","up_25_to_flat","flat_to_down_25","down_25_to_flat","flat","flat",{"speed":20,"t":"brakes"},"flat","flat_to_up_25","up_25","up_25_to_flat","flat","flat","flat","flat_to_left_bank","banked_left_turn_3","left_bank_to_flat","flat","flat","flat","flat",{"speed":25,"t":"booster"},"flat_to_right_bank","right_helix_up_small","right_helix_up_small","right_bank","right_bank","right_bank","right_bank","right_helix_down_small","right_helix_down_small","right_bank_to_flat","flat","flat_to_left_bank","banked_left_turn_3","left_bank_to_flat","flat","flat","flat","flat_to_down_25","down_25","down_25_to_flat",{"speed":13,"t":"brakes"},{"speed":9,"t":"brakes"}]}
    {"circuit_closed":false,"cursor":{"bank":0,"dir":0,"slope":0,"x":64,"y":40,"z":144},"placed_this_call":46,"rejection":{"error":"Twister Roller Coaster 1 in the way","index":46,"piece":"flat"},"total_placed":207}
  54. screenshot
    [image]
  55. valid_next_pieces
    {"cursor":{"bank":0,"dir":0,"slope":0,"x":64,"y":40,"z":144},"valid_pieces":["right_turn_3"]}
  56. undo_piece
    {"cursor":{"bank":0,"dir":0,"slope":0,"x":65,"y":40,"z":144},"pieces_placed":206,"removed":"flat"}
  57. undo_piece
    {"cursor":{"bank":0,"dir":0,"slope":0,"x":66,"y":40,"z":144},"pieces_placed":205,"removed":"flat"}
  58. undo_piece
    {"cursor":{"bank":2,"dir":0,"slope":0,"x":67,"y":40,"z":144},"pieces_placed":204,"removed":"left_bank_to_flat"}
  59. undo_piece
    {"cursor":{"bank":2,"dir":1,"slope":0,"x":69,"y":39,"z":144},"pieces_placed":203,"removed":"banked_left_turn_3"}
  60. undo_piece
    {"cursor":{"bank":0,"dir":1,"slope":0,"x":69,"y":38,"z":144},"pieces_placed":202,"removed":"flat_to_left_bank"}
  61. place_pieces
    {"pieces":["flat","flat_to_left_bank","banked_left_turn_3","left_bank_to_flat","flat","s_bend_left","flat_to_down_25","down_25","down_25_to_flat",{"speed":9,"t":"brakes"}]}
    {"circuit_closed":false,"cursor":{"bank":0,"dir":0,"slope":0,"x":65,"y":41,"z":144},"placed_this_call":5,"rejection":{"error":"Twister Roller Coaster 1 in the way","index":5,"piece":"s_bend_left"},"total_placed":207}
  62. valid_next_pieces
    {"cursor":{"bank":0,"dir":0,"slope":0,"x":65,"y":41,"z":144},"valid_pieces":["flat","end_station","begin_station","middle_station","flat_to_up_25","flat_to_down_25","right_turn_5","flat_to_left_bank","flat_to_right_bank","s_bend_right","right_turn_3","left_corkscrew_up","right_corkscrew_up","flat_to_up_60","flat_to_down_60","brakes","booster"]}
  63. place_pieces
    {"pieces":["flat","flat","flat","left_turn_1","right_turn_1","flat_to_down_25","down_25","down_25_to_flat"]}
    {"circuit_closed":false,"cursor":{"bank":0,"dir":0,"slope":0,"x":62,"y":41,"z":144},"placed_this_call":3,"rejection":{"error":"ride type 51 has no artwork for this piece: it would build and rate but render as nothing (invisible track). valid_next_pieces lists what this ride can draw here","index":3,"piece":"left_turn_1"},"total_placed":210}
  64. undo_piece
    {"cursor":{"bank":0,"dir":0,"slope":0,"x":63,"y":41,"z":144},"pieces_placed":209,"removed":"flat"}
  65. undo_piece
    {"cursor":{"bank":0,"dir":0,"slope":0,"x":64,"y":41,"z":144},"pieces_placed":208,"removed":"flat"}
  66. undo_piece
    {"cursor":{"bank":0,"dir":0,"slope":0,"x":65,"y":41,"z":144},"pieces_placed":207,"removed":"flat"}
  67. place_pieces
    {"pieces":["flat_to_down_25","down_25","down_25_to_flat","s_bend_left",{"speed":9,"t":"brakes"}]}
    {"circuit_closed":false,"cursor":{"bank":0,"dir":0,"slope":6,"x":64,"y":41,"z":136},"placed_this_call":1,"rejection":{"error":"Twister Roller Coaster 1 in the way","index":1,"piece":"down_25"},"total_placed":208}
  68. best_result
    {"bounds":{"max_tile_x":72,"max_tile_y":52,"max_z":392,"min_tile_x":28,"min_tile_y":20,"min_z":112},"placed_pieces":["begin_station","middle_station","middle_station","end_station",{"chain":true,"t":"flat_to_up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25_to_flat"},"flat_to_down_60","down_60","down_60","down_60","down_60_to_down_25","down_25_to_flat","flat_to_up_25","half_loop_up","left_corkscrew_down","flat_to_down_25","down_25","down_25","down_25","down_25","down_25_to_flat",{"speed":26,"t":"brakes"},"flat_to_right_bank","banked_right_turn_3","right_bank_to_flat","flat_to_up_25","up_25","up_25_to_flat","flat_to_down_25","down_25","down_25_to_flat",{"speed":26,"t":"brakes"},"flat_to_up_25","left_vertical_loop","down_25_to_flat",{"speed":25,"t":"booster"},"flat_to_up_25","right_vertical_loop","down_… (4594 chars)

  69. **Best banked: excitement 7.88** — up from last round's 7.70. What happened this round: 1. **Replayed last round's layout** to bank a safe 7.70 baseline immediately. 2. **Tried adding two vertical loops** (7 inversions): intensity blew past 10 (10.58 → excitement crashed to 5.92; then trimmed to 10.03 → 7.54). The banked score protected me both times. 3. **Winning move (variant D):** kept the original 5-inversion skeleton and added a **second full 360° helix** on the elevated return leg — helixes turned out to be the best excitement-per-intensity buy: excitement 7.70 → 7.88 with intensity landing at 9.88, just under the cliff. 4. A third-helix variant couldn't close its circuit (the new helix's footprint blocked every usable corridor back to the station at both heights), so I stopped with the safe bank intact. **Final coaster:** 209-piece steel twister — 21-tile chain lift into a 31 m drop, half-loop + corkscrew combo, three vertical loops, a corkscrew pair, two double-helix sections, 19 drops and 130 airtime units. Excitement **7.88**, intensity 9.88, nausea 5.76, similarity 0.31 (no penalty).

← claude-fable-5 · 20260803-fable5-design-full · all runs