TRACE · ROUND 6

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 6 back to model →
events
47
tool calls
43
rejected
2
session
0:00
Session trace

  1. Final round — I'll load the coaster tools, build on my best prior layout, bank a score early, then style the winner.

  2. ToolSearch
    {"max_results":15,"query":"+coaster"}
  3. 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}
  4. 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":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_25_to_flat",{"speed":26,"t":"booster"},"flat_to_up_25","up_25_to_flat","flat_to_down_25","down_25_to_flat"… (3677 chars)
    pieces array too large (209 > 200 max)
  5. 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":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_25_to_flat",{"speed":26,"t":"booster"},"flat_to_up_25","up_25_to_flat","flat_to_down_25","down_25_to_flat"… (2783 chars)
    {"circuit_closed":false,"cursor":{"bank":0,"dir":0,"slope":0,"x":44,"y":20,"z":112},"placed_this_call":153,"total_placed":153}
  6. place_pieces
    {"pieces":["flat_to_right_bank","banked_right_turn_3","banked_right_turn_3","right_bank_to_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","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":56,"total_placed":209}

  7. Circuit closed on the replay. Testing now to bank the score.

  8. 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)
  9. demolish
    {"demolished":0}
  10. 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}
  11. 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":24,"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":23,"t":"brakes"},"flat_to_up_25","left_vertical_loop","down_25_to_flat",{"speed":23,"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"… (2783 chars)
    {"circuit_closed":false,"cursor":{"bank":0,"dir":0,"slope":0,"x":44,"y":20,"z":112},"placed_this_call":153,"total_placed":153}
  12. place_pieces
    {"pieces":["flat_to_right_bank","banked_right_turn_3","banked_right_turn_3","right_bank_to_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","flat","flat","flat","flat",{"speed":22,"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":56,"total_placed":209}
  13. 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":24,"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":23,"t":"brakes"},"flat_to_up_25","left_vertical_loop","down_25_to_flat",{"speed":23,"t":"booster"},"flat_to_up_25","right_vertical_loop","down_… (4579 chars)
  14. demolish
    {"demolished":0}
  15. 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}
  16. 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":23,"t":"brakes"},"flat_to_up_25","left_vertical_loop","down_25_to_flat",{"speed":23,"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"… (2783 chars)
    {"circuit_closed":false,"cursor":{"bank":0,"dir":0,"slope":0,"x":44,"y":20,"z":112},"placed_this_call":153,"total_placed":153}
  17. place_pieces
    {"pieces":["flat_to_right_bank","banked_right_turn_3","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":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":22,"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":56,"total_placed":209}
  18. 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":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":23,"t":"brakes"},"flat_to_up_25","left_vertical_loop","down_25_to_flat",{"speed":23,"t":"booster"},"flat_to_up_25","right_vertical_loop","down_… (4579 chars)
  19. 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)
  20. demolish
    {"demolished":0}
  21. 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}
  22. 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":22,"t":"brakes"},"flat_to_up_25","left_vertical_loop","down_25_to_flat",{"speed":22,"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"… (2840 chars)
    {"circuit_closed":false,"cursor":{"bank":0,"dir":0,"slope":0,"x":60,"y":48,"z":128},"placed_this_call":71,"rejection":{"error":"Twister Roller Coaster 1 in the way","index":71,"piece":"flat_to_down_25"},"total_placed":71}
  23. undo_piece
    {"cursor":{"bank":0,"dir":0,"slope":2,"x":61,"y":48,"z":120},"pieces_placed":70,"removed":"up_25_to_flat"}
  24. undo_piece
    {"cursor":{"bank":0,"dir":0,"slope":0,"x":62,"y":48,"z":112},"pieces_placed":69,"removed":"flat_to_up_25"}
  25. undo_piece
    {"cursor":{"bank":0,"dir":0,"slope":0,"x":63,"y":48,"z":112},"pieces_placed":68,"removed":"booster"}
  26. undo_piecerejected
    undo failed: Track element not found
  27. get_state
    {"circuit_closed":false,"cursor":{"bank":0,"dir":0,"slope":0,"x":63,"y":48,"z":112},"finalized":false,"pieces_placed":68,"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":22,"t":"brakes"},"flat_to_up_25","left_vertical_loop","down_25_to_flat",{"speed":22,"t":"booster"},"flat_to_up_25","right_… (1609 chars)
  28. demolish
    {"demolished":0}
  29. 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}
  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"},{"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":23,"t":"brakes"},"flat_to_up_25","left_vertical_loop","down_25_to_flat",{"speed":23,"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"… (1633 chars)
    {"circuit_closed":false,"cursor":{"bank":0,"dir":0,"slope":0,"x":47,"y":47,"z":112},"placed_this_call":81,"total_placed":81}
  31. place_pieces
    {"pieces":["left_corkscrew_up","right_corkscrew_down","right_corkscrew_up","left_corkscrew_down"]}
    {"circuit_closed":false,"cursor":{"bank":0,"dir":0,"slope":0,"x":41,"y":47,"z":112},"placed_this_call":4,"total_placed":85}

  32. Quad placed cleanly — 4 extra inversions with the same net footprint. Continuing the rest of the circuit:

  33. place_pieces
    {"pieces":["flat_to_left_bank","banked_left_turn_3","left_bank","banked_left_turn_3","left_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":18,"t":"brakes"},"flat","flat","flat","flat_to_right_bank","banked_right_turn_3","right_bank_to_flat","flat","flat","flat","flat","flat","flat","flat","flat","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","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","ri… (2027 chars)
    {"circuit_closed":true,"cursor":{"bank":0,"dir":0,"slope":0,"x":58,"y":40,"z":112},"placed_this_call":126,"total_placed":211}
  34. 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":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":23,"t":"brakes"},"flat_to_up_25","left_vertical_loop","down_25_to_flat",{"speed":23,"t":"booster"},"flat_to_up_25","right_vertical_loop","down_… (4635 chars)
  35. demolish
    {"demolished":0}
  36. 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}
  37. 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":23,"t":"brakes"},"flat_to_up_25","left_vertical_loop","down_25_to_flat",{"speed":23,"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"… (2840 chars)
    {"circuit_closed":false,"cursor":{"bank":0,"dir":0,"slope":0,"x":44,"y":20,"z":112},"placed_this_call":155,"total_placed":155}
  38. place_pieces
    {"pieces":["flat_to_right_bank","banked_right_turn_3","banked_right_turn_3","right_bank_to_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":19,"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":22,"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":56,"total_placed":211}
  39. 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":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":23,"t":"brakes"},"flat_to_up_25","left_vertical_loop","down_25_to_flat",{"speed":23,"t":"booster"},"flat_to_up_25","right_vertical_loop","down_… (4647 chars)
  40. demolish
    {"demolished":0}
  41. 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}
  42. 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":24,"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":22,"t":"brakes"},"flat_to_up_25","left_vertical_loop","down_25_to_flat",{"speed":22,"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"… (2840 chars)
    {"circuit_closed":false,"cursor":{"bank":0,"dir":0,"slope":0,"x":44,"y":20,"z":112},"placed_this_call":155,"total_placed":155}
  43. place_pieces
    {"pieces":["flat_to_right_bank","banked_right_turn_3","banked_right_turn_3","right_bank_to_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":19,"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":21,"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":56,"total_placed":211}
  44. 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":24,"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":22,"t":"brakes"},"flat_to_up_25","left_vertical_loop","down_25_to_flat",{"speed":22,"t":"booster"},"flat_to_up_25","right_vertical_loop","down_… (4649 chars)
  45. 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":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":23,"t":"brakes"},"flat_to_up_25","left_vertical_loop","down_25_to_flat",{"speed":23,"t":"booster"},"flat_to_up_25","right_vertical_loop","down_… (4647 chars)
  46. style_best_ride
    {"name":"Sevenfold Serpent","rail_color":"bright_yellow","support_color":"black","track_color":"dark_purple"}
    {"presentation":{"name":"Sevenfold Serpent","rail_color":"bright_yellow","support_color":"black","track_color":"dark_purple"},"score":7.940000057220459,"score_changed":false,"styled":"best_result"}

  47. **Best coaster: "Sevenfold Serpent" — 7.94 excitement** (steel twister, 211 pieces, 7 inversions, similarity 0.30 so no penalty), styled in dark purple with bright yellow rails and black supports. How the round went: I first replayed my Round-5 layout to bank 7.88 immediately, then iterated. Pure G-softening (lower brake/booster speeds) dropped intensity 9.88→9.46 but also excitement to 7.81, and I discovered boosters cap out around 28 so "spending" the headroom on faster airtime hills did nothing. The winning move was structural: `piece_geometry` showed a chain of four alternating corkscrews (right-up, left-down, left-up, right-down) has exactly the same net footprint as an s-bend pair — 6 tiles forward, no lateral offset, direction preserved — so I swapped it in for the second s-bend pair, going from 5 to 7 inversions. The first attempt at that swap collided with neighboring track and an over-fast version hit intensity 10.41 (excitement cratered to 5.98), but with the corkscrew entries slowed to ~15–17 the same layout scored 7.94, which two further tuning passes couldn't beat. **Final: Sevenfold Serpent, excitement 7.94 — banked and styled.**

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