TRACE · ROUND 5

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

claude-opus-4-8 · 20260724-opus48-twister · round 5 back to model →
events
86
tool calls
58
rejected
0
session
0:00
Session trace
  1. ToolSearch
    {"max_results":15,"query":"select:new_ride,place_piece,place_pieces,valid_next_pieces,piece_geometry,undo_piece,get_state,finish_and_test,best_result,screenshot,demolish"}
    No matching deferred tools found
  2. ToolSearch
    {"max_results":20,"query":"coaster ride place piece station"}
  3. piece_geometry
    {"dir":2}
    {"deltas":[{"bank_out":0,"dir_out":2,"dx_tiles":1,"dy_tiles":0,"dz":0,"piece":"flat","slope_out":0},{"bank_out":0,"dir_out":2,"dx_tiles":1,"dy_tiles":0,"dz":0,"piece":"end_station","slope_out":0},{"bank_out":0,"dir_out":2,"dx_tiles":1,"dy_tiles":0,"dz":0,"piece":"begin_station","slope_out":0},{"bank_out":0,"dir_out":2,"dx_tiles":1,"dy_tiles":0,"dz":0,"piece":"middle_station","slope_out":0},{"bank_out":0,"dir_out":2,"dx_tiles":1,"dy_tiles":0,"dz":16,"piece":"up_25","slope_out":2},{"bank_out":0,"dir_out":2,"dx_tiles":1,"dy_tiles":0,"dz":64,"piece":"up_60","slope_out":4},{"bank_out":0,"dir_out":2,"dx_tiles":1,"dy_tiles":0,"dz":8,"piece":"flat_to_up_25","slope_out":2},{"bank_out":0,"dir_out":2,"dx_tiles":1,"dy_tiles":0,"dz":32,"piece":"up_25_to_up_60","slope_out":4},{"bank_out":0,"dir_out":2,"dx_tiles":1,"dy_tiles":0,"dz":32,"piece":"up_60_to_up_25","slope_out":2},{"bank_out":0,"dir_out":2,"dx_tiles":1,"dy_tiles":0,"dz":8,"piece":"up_25_to_flat","slope_out":0},{"bank_out":0,"dir_out":2,"dx_tiles":1,"dy_tiles":0,"dz":-16,"piece":"down_25","slope_out":6},{"bank_out":0,"dir_out":2,"dx_tiles":1,"dy_tiles":0,"dz":-64,"piece":"down_60","slope_out":8},{"bank_out":0,"dir_out":2,"dx_tiles":1,"d… (7346 chars)
  4. piece_geometry
    {"dir":1}
    {"deltas":[{"bank_out":0,"dir_out":1,"dx_tiles":0,"dy_tiles":1,"dz":0,"piece":"flat","slope_out":0},{"bank_out":0,"dir_out":1,"dx_tiles":0,"dy_tiles":1,"dz":0,"piece":"end_station","slope_out":0},{"bank_out":0,"dir_out":1,"dx_tiles":0,"dy_tiles":1,"dz":0,"piece":"begin_station","slope_out":0},{"bank_out":0,"dir_out":1,"dx_tiles":0,"dy_tiles":1,"dz":0,"piece":"middle_station","slope_out":0},{"bank_out":0,"dir_out":1,"dx_tiles":0,"dy_tiles":1,"dz":16,"piece":"up_25","slope_out":2},{"bank_out":0,"dir_out":1,"dx_tiles":0,"dy_tiles":1,"dz":64,"piece":"up_60","slope_out":4},{"bank_out":0,"dir_out":1,"dx_tiles":0,"dy_tiles":1,"dz":8,"piece":"flat_to_up_25","slope_out":2},{"bank_out":0,"dir_out":1,"dx_tiles":0,"dy_tiles":1,"dz":32,"piece":"up_25_to_up_60","slope_out":4},{"bank_out":0,"dir_out":1,"dx_tiles":0,"dy_tiles":1,"dz":32,"piece":"up_60_to_up_25","slope_out":2},{"bank_out":0,"dir_out":1,"dx_tiles":0,"dy_tiles":1,"dz":8,"piece":"up_25_to_flat","slope_out":0},{"bank_out":0,"dir_out":1,"dx_tiles":0,"dy_tiles":1,"dz":-16,"piece":"down_25","slope_out":6},{"bank_out":0,"dir_out":1,"dx_tiles":0,"dy_tiles":1,"dz":-64,"piece":"down_60","slope_out":8},{"bank_out":0,"dir_out":1,"dx_tiles":0,"d… (7346 chars)
  5. 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)
  6. piece_geometry
    {"dir":3}
    {"deltas":[{"bank_out":0,"dir_out":3,"dx_tiles":0,"dy_tiles":-1,"dz":0,"piece":"flat","slope_out":0},{"bank_out":0,"dir_out":3,"dx_tiles":0,"dy_tiles":-1,"dz":0,"piece":"end_station","slope_out":0},{"bank_out":0,"dir_out":3,"dx_tiles":0,"dy_tiles":-1,"dz":0,"piece":"begin_station","slope_out":0},{"bank_out":0,"dir_out":3,"dx_tiles":0,"dy_tiles":-1,"dz":0,"piece":"middle_station","slope_out":0},{"bank_out":0,"dir_out":3,"dx_tiles":0,"dy_tiles":-1,"dz":16,"piece":"up_25","slope_out":2},{"bank_out":0,"dir_out":3,"dx_tiles":0,"dy_tiles":-1,"dz":64,"piece":"up_60","slope_out":4},{"bank_out":0,"dir_out":3,"dx_tiles":0,"dy_tiles":-1,"dz":8,"piece":"flat_to_up_25","slope_out":2},{"bank_out":0,"dir_out":3,"dx_tiles":0,"dy_tiles":-1,"dz":32,"piece":"up_25_to_up_60","slope_out":4},{"bank_out":0,"dir_out":3,"dx_tiles":0,"dy_tiles":-1,"dz":32,"piece":"up_60_to_up_25","slope_out":2},{"bank_out":0,"dir_out":3,"dx_tiles":0,"dy_tiles":-1,"dz":8,"piece":"up_25_to_flat","slope_out":0},{"bank_out":0,"dir_out":3,"dx_tiles":0,"dy_tiles":-1,"dz":-16,"piece":"down_25","slope_out":6},{"bank_out":0,"dir_out":3,"dx_tiles":0,"dy_tiles":-1,"dz":-64,"piece":"down_60","slope_out":8},{"bank_out":0,"dir_out":3,"dx… (7397 chars)

  7. I'll design a parity-safe original layout. Let me start building and verify with the tools as I go.

  8. ToolSearch
    {"max_results":6,"query":"select:mcp__coaster__new_ride,mcp__coaster__get_state,mcp__coaster__finish_and_test,mcp__coaster__best_result,mcp__coaster__demolish,mcp__coaster__valid_next_pieces"}

  9. Now I'll build. Starting the ride with station + lift + big drop + a corkscrew barrel (leg 1):

  10. new_ride
    {"dir":2,"ride_type":51,"x":34,"y":50}
    {"cursor":{"bank":0,"dir":2,"slope":0,"x":34,"y":50,"z":112},"ride_id":0}
  11. place_pieces
    {"pieces":["begin_station","middle_station","middle_station","end_station",{"chain":true,"piece":"flat_to_up_25"},{"chain":true,"piece":"up_25"},{"chain":true,"piece":"up_25"},{"chain":true,"piece":"up_25"},{"chain":true,"piece":"up_25"},{"chain":true,"piece":"up_25"},{"chain":true,"piece":"up_25"},{"chain":true,"piece":"up_25"},"up_25_to_flat","flat_to_down_25","down_25","down_25","down_25","down_25","down_25","down_25","down_25","down_25_to_flat","left_corkscrew_up","right_corkscrew_down"]}
    {"circuit_closed":false,"cursor":{"bank":0,"dir":2,"slope":0,"x":59,"y":53,"z":112},"placed_this_call":24,"total_placed":24}

  12. Cursor is at (59,53). Let me verify and plan the return. Building the first corner and short leg:

  13. place_pieces
    {"pieces":["right_turn_5","flat_to_up_25","up_25","up_25_to_flat","flat_to_down_25","down_25","down_25_to_flat","right_turn_5"]}
    {"circuit_closed":false,"cursor":{"bank":0,"dir":0,"slope":0,"x":58,"y":42,"z":112},"placed_this_call":8,"total_placed":32}

  14. At (58,42) dir0. Now the return leg with airtime hills (25 tiles):

  15. place_pieces
    {"pieces":["flat_to_up_25","up_25","up_25_to_flat","flat_to_down_25","down_25","down_25_to_flat","flat_to_up_25","up_25","up_25_to_flat","flat_to_down_25","down_25","down_25_to_flat","flat_to_up_25","up_25","up_25_to_flat","flat_to_down_25","down_25","down_25_to_flat","brakes","brakes","brakes","brakes","flat","flat","flat"]}
    {"circuit_closed":false,"cursor":{"bank":0,"dir":0,"slope":0,"x":33,"y":42,"z":112},"placed_this_call":25,"total_placed":57}

  16. At (33,42) dir0. Now the closing corners — let me place corner C and measure:

  17. place_piece
    {"piece":"right_turn_5"}
    {"circuit_closed":false,"cost":2356,"cursor":{"bank":0,"dir":1,"slope":0,"x":31,"y":45,"z":112},"pieces_placed":58,"placed":"right_turn_5"}
  18. place_pieces
    {"pieces":["brakes","brakes","brakes"]}
    {"circuit_closed":false,"cursor":{"bank":0,"dir":1,"slope":0,"x":31,"y":48,"z":112},"placed_this_call":3,"total_placed":61}

  19. At (31,48) dir1 — the closing corner should land back on the station:

  20. place_piece
    {"piece":"right_turn_5"}
    {"circuit_closed":true,"cost":2356,"cursor":{"bank":0,"dir":2,"slope":0,"x":34,"y":50,"z":112},"pieces_placed":62,"placed":"right_turn_5"}

  21. Circuit closed at the origin. Let me test it to bank a score:

  22. finish_and_test
    {"bounds":{"max_tile_x":61,"max_tile_y":53,"max_z":264,"min_tile_x":31,"min_tile_y":42,"min_z":112},"placed_pieces":["begin_station","middle_station","middle_station","end_station","flat_to_up_25","up_25","up_25","up_25","up_25","up_25","up_25","up_25","up_25_to_flat","flat_to_down_25","down_25","down_25","down_25","down_25","down_25","down_25","down_25","down_25_to_flat","left_corkscrew_up","right_corkscrew_down","right_turn_5","flat_to_up_25","up_25","up_25_to_flat","flat_to_down_25","down_25","down_25_to_flat","right_turn_5","flat_to_up_25","up_25","up_25_to_flat","flat_to_down_25","down_25","down_25_to_flat","flat_to_up_25","up_25","up_25_to_flat","flat_to_down_25","down_25","down_25_to_flat","flat_to_up_25","up_25","up_25_to_flat","flat_to_down_25","down_25","down_25_to_flat","brakes","brakes","brakes","brakes","flat","flat","flat","right_turn_5","brakes","brakes","brakes","right_turn_5"],"program":null,"rides":[{"average_speed":71121,"crashed":false,"excitement":5.96999979019165,"highest_drop":16,"id":0,"intensity":5.010000228881836,"max_lateral_g":2.2100000381469727,"max_negative_g":-0.4300000071525574,"max_positive_g":3.799999952316284,"max_speed":1064653,"nausea":2.7400000… (1584 chars)

  23. Good — 5.97 banked (intensity only 5.0, lots of headroom). Let me build a bolder version with more inversions and airtime. Demolishing to rebuild:

  24. demolish
    {"demolished":0}
  25. new_ride
    {"dir":2,"ride_type":51,"x":34,"y":50}
    {"cursor":{"bank":0,"dir":2,"slope":0,"x":34,"y":50,"z":112},"ride_id":0}
  26. place_pieces
    {"pieces":["begin_station","middle_station","middle_station","end_station",{"chain":true,"piece":"flat_to_up_25"},{"chain":true,"piece":"up_25"},{"chain":true,"piece":"up_25"},{"chain":true,"piece":"up_25"},{"chain":true,"piece":"up_25"},{"chain":true,"piece":"up_25"},{"chain":true,"piece":"up_25"},{"chain":true,"piece":"up_25"},{"chain":true,"piece":"up_25"},{"chain":true,"piece":"up_25"},"up_25_to_flat","flat_to_down_25","down_25","down_25","down_25","down_25","down_25","down_25","down_25","down_25","down_25","down_25_to_flat","left_corkscrew_up","right_corkscrew_down","left_corkscrew_up","right_corkscrew_down"]}
    {"circuit_closed":false,"cursor":{"bank":0,"dir":2,"slope":0,"x":66,"y":56,"z":112},"placed_this_call":30,"total_placed":30}

  27. y drifted toward the lake. Let me restart shifted south to stay clear:

  28. demolish
    {"demolished":0}
  29. new_ride
    {"dir":2,"ride_type":51,"x":34,"y":44}
    {"cursor":{"bank":0,"dir":2,"slope":0,"x":34,"y":44,"z":112},"ride_id":0}
  30. place_pieces
    {"pieces":["begin_station","middle_station","middle_station","end_station",{"chain":true,"piece":"flat_to_up_25"},{"chain":true,"piece":"up_25"},{"chain":true,"piece":"up_25"},{"chain":true,"piece":"up_25"},{"chain":true,"piece":"up_25"},{"chain":true,"piece":"up_25"},{"chain":true,"piece":"up_25"},{"chain":true,"piece":"up_25"},{"chain":true,"piece":"up_25"},{"chain":true,"piece":"up_25"},"up_25_to_flat","flat_to_down_25","down_25","down_25","down_25","down_25","down_25","down_25","down_25","down_25","down_25","down_25_to_flat","left_corkscrew_up","right_corkscrew_down","left_corkscrew_up","right_corkscrew_down"]}
    {"circuit_closed":false,"cursor":{"bank":0,"dir":2,"slope":0,"x":66,"y":50,"z":112},"placed_this_call":30,"total_placed":30}

  31. At (66,50) dir2. Now closing with right-hand corners (curling away from the lake). Corner A + leg 2 + corner B:

  32. place_pieces
    {"pieces":["right_turn_5","flat_to_up_25","up_25","up_25_to_flat","flat_to_down_25","down_25","down_25_to_flat","flat","flat","flat","right_turn_5"]}
    {"circuit_closed":false,"cursor":{"bank":0,"dir":0,"slope":0,"x":65,"y":36,"z":112},"placed_this_call":11,"total_placed":41}

  33. At (65,36) dir0. Return leg with 5 airtime hills (32 tiles):

  34. place_pieces
    {"pieces":["flat_to_up_25","up_25","up_25_to_flat","flat_to_down_25","down_25","down_25_to_flat","flat_to_up_25","up_25","up_25_to_flat","flat_to_down_25","down_25","down_25_to_flat","flat_to_up_25","up_25","up_25_to_flat","flat_to_down_25","down_25","down_25_to_flat","flat_to_up_25","up_25","up_25_to_flat","flat_to_down_25","down_25","down_25_to_flat","flat_to_up_25","up_25","up_25_to_flat","flat_to_down_25","down_25","down_25_to_flat","brakes","brakes"]}
    {"circuit_closed":false,"cursor":{"bank":0,"dir":0,"slope":0,"x":33,"y":36,"z":112},"placed_this_call":32,"total_placed":73}
  35. place_piece
    {"piece":"right_turn_5"}
    {"circuit_closed":false,"cost":2356,"cursor":{"bank":0,"dir":1,"slope":0,"x":31,"y":39,"z":112},"pieces_placed":74,"placed":"right_turn_5"}
  36. place_pieces
    {"pieces":["brakes","brakes","brakes","right_turn_5"]}
    {"circuit_closed":true,"cursor":{"bank":0,"dir":2,"slope":0,"x":34,"y":44,"z":112},"placed_this_call":4,"total_placed":78}

  37. Circuit closed. Testing v2:

  38. finish_and_test
    {"bounds":{"max_tile_x":68,"max_tile_y":50,"max_z":296,"min_tile_x":31,"min_tile_y":36,"min_z":112},"placed_pieces":["begin_station","middle_station","middle_station","end_station","flat_to_up_25","up_25","up_25","up_25","up_25","up_25","up_25","up_25","up_25","up_25","up_25_to_flat","flat_to_down_25","down_25","down_25","down_25","down_25","down_25","down_25","down_25","down_25","down_25","down_25_to_flat","left_corkscrew_up","right_corkscrew_down","left_corkscrew_up","right_corkscrew_down","right_turn_5","flat_to_up_25","up_25","up_25_to_flat","flat_to_down_25","down_25","down_25_to_flat","flat","flat","flat","right_turn_5","flat_to_up_25","up_25","up_25_to_flat","flat_to_down_25","down_25","down_25_to_flat","flat_to_up_25","up_25","up_25_to_flat","flat_to_down_25","down_25","down_25_to_flat","flat_to_up_25","up_25","up_25_to_flat","flat_to_down_25","down_25","down_25_to_flat","flat_to_up_25","up_25","up_25_to_flat","flat_to_down_25","down_25","down_25_to_flat","flat_to_up_25","up_25","up_25_to_flat","flat_to_down_25","down_25","down_25_to_flat","brakes","brakes","right_turn_5","brakes","brakes","brakes","right_turn_5"],"program":null,"rides":[{"average_speed":120200,"crashed":fa… (1822 chars)

  39. 6.30 banked — clear improvement. Let me push once more (v3): steeper 60° drop, a third corkscrew barrel, and steeper airtime hills.

  40. demolish
    {"demolished":0}
  41. new_ride
    {"dir":2,"ride_type":51,"x":34,"y":42}
    {"cursor":{"bank":0,"dir":2,"slope":0,"x":34,"y":42,"z":112},"ride_id":0}
  42. place_pieces
    {"pieces":["begin_station","middle_station","middle_station","end_station",{"chain":true,"piece":"flat_to_up_25"},{"chain":true,"piece":"up_25"},{"chain":true,"piece":"up_25"},{"chain":true,"piece":"up_25"},{"chain":true,"piece":"up_25"},{"chain":true,"piece":"up_25"},{"chain":true,"piece":"up_25"},{"chain":true,"piece":"up_25"},{"chain":true,"piece":"up_25"},{"chain":true,"piece":"up_25"},"up_25_to_flat","flat_to_down_60","down_60","down_60","down_60_to_flat"]}
    {"circuit_closed":false,"cursor":{"bank":0,"dir":2,"slope":8,"x":52,"y":42,"z":120},"placed_this_call":18,"rejection":{"error":"Raise or lower land first","index":18,"piece":"down_60_to_flat"},"total_placed":18}
  43. get_state
    {"circuit_closed":false,"cursor":{"bank":0,"dir":2,"slope":8,"x":52,"y":42,"z":120},"finalized":false,"pieces_placed":18,"placed_pieces":["begin_station","middle_station","middle_station","end_station","flat_to_up_25","up_25","up_25","up_25","up_25","up_25","up_25","up_25","up_25","up_25","up_25_to_flat","flat_to_down_60","down_60","down_60"],"ride_id":0,"start":{"bank":0,"dir":2,"slope":0,"x":34,"y":42,"z":112},"total_cost":15954}

  44. The 60° drop overshoots below ground. Let me revert the drop to the reliable 25° version and add a third barrel:

  45. undo_piece
    {"cursor":{"bank":0,"dir":2,"slope":8,"x":51,"y":42,"z":184},"pieces_placed":17,"removed":"down_60"}
  46. undo_piece
    {"cursor":{"bank":0,"dir":2,"slope":8,"x":50,"y":42,"z":248},"pieces_placed":16,"removed":"down_60"}
  47. undo_piece
    {"cursor":{"bank":0,"dir":2,"slope":0,"x":49,"y":42,"z":272},"pieces_placed":15,"removed":"flat_to_down_60"}
  48. place_pieces
    {"pieces":["flat_to_down_25","down_25","down_25","down_25","down_25","down_25","down_25","down_25","down_25","down_25_to_flat"]}
    {"circuit_closed":false,"cursor":{"bank":0,"dir":2,"slope":0,"x":59,"y":42,"z":128},"placed_this_call":10,"total_placed":25}
  49. valid_next_pieces
    {"cursor":{"bank":0,"dir":2,"slope":0,"x":59,"y":42,"z":128},"valid_pieces":["flat","end_station","begin_station","middle_station","flat_to_up_25","flat_to_down_25","left_turn_5","right_turn_5","flat_to_left_bank","flat_to_right_bank","s_bend_left","s_bend_right","left_turn_3","right_turn_3","left_corkscrew_up","right_corkscrew_up","flat_to_up_60","brakes","booster"]}
  50. place_pieces
    {"pieces":["flat_to_down_25","down_25_to_flat","left_corkscrew_up","right_corkscrew_down","left_corkscrew_up","right_corkscrew_down"]}
    {"circuit_closed":false,"cursor":{"bank":0,"dir":2,"slope":0,"x":67,"y":48,"z":112},"placed_this_call":6,"total_placed":31}

  51. At (67,48) rel0 after 2 barrels. Trying a third barrel:

  52. place_pieces
    {"pieces":["left_corkscrew_up","right_corkscrew_down"]}
    {"circuit_closed":false,"cursor":{"bank":0,"dir":2,"slope":0,"x":70,"y":51,"z":112},"placed_this_call":2,"total_placed":33}

  53. Third barrel in — 3 inversions now. At (70,51) dir2. Closing with corner A + leg 2 (airtime hills) + corner B:

  54. place_pieces
    {"pieces":["right_turn_5","flat_to_up_25","up_25","up_25_to_flat","flat_to_down_25","down_25","down_25_to_flat","flat_to_up_25","up_25","up_25_to_flat","flat_to_down_25","down_25","down_25_to_flat","right_turn_5"]}
    {"circuit_closed":false,"cursor":{"bank":0,"dir":0,"slope":0,"x":69,"y":34,"z":112},"placed_this_call":14,"total_placed":47}

  55. At (69,34) dir0. Long return leg with airtime hills + brakes (36 tiles):

  56. place_pieces
    {"pieces":["flat_to_up_25","up_25","up_25_to_flat","flat_to_down_25","down_25","down_25_to_flat","flat_to_up_25","up_25","up_25_to_flat","flat_to_down_25","down_25","down_25_to_flat","flat_to_up_25","up_25","up_25_to_flat","flat_to_down_25","down_25","down_25_to_flat","flat_to_up_25","up_25","up_25_to_flat","flat_to_down_25","down_25","down_25_to_flat","flat_to_up_25","up_25","up_25_to_flat","flat_to_down_25","down_25","down_25_to_flat","brakes","brakes","brakes","flat","flat","flat"]}
    {"circuit_closed":false,"cursor":{"bank":0,"dir":0,"slope":0,"x":33,"y":34,"z":112},"placed_this_call":36,"total_placed":83}
  57. place_piece
    {"piece":"right_turn_5"}
    {"circuit_closed":false,"cost":2356,"cursor":{"bank":0,"dir":1,"slope":0,"x":31,"y":37,"z":112},"pieces_placed":84,"placed":"right_turn_5"}
  58. place_pieces
    {"pieces":["brakes","brakes","brakes","right_turn_5"]}
    {"circuit_closed":true,"cursor":{"bank":0,"dir":2,"slope":0,"x":34,"y":42,"z":112},"placed_this_call":4,"total_placed":88}

  59. Closed. Testing v3 (3 inversions):

  60. finish_and_test
    {"bounds":{"max_tile_x":72,"max_tile_y":51,"max_z":296,"min_tile_x":31,"min_tile_y":34,"min_z":112},"placed_pieces":["begin_station","middle_station","middle_station","end_station","flat_to_up_25","up_25","up_25","up_25","up_25","up_25","up_25","up_25","up_25","up_25","up_25_to_flat","flat_to_down_25","down_25","down_25","down_25","down_25","down_25","down_25","down_25","down_25","down_25_to_flat","flat_to_down_25","down_25_to_flat","left_corkscrew_up","right_corkscrew_down","left_corkscrew_up","right_corkscrew_down","left_corkscrew_up","right_corkscrew_down","right_turn_5","flat_to_up_25","up_25","up_25_to_flat","flat_to_down_25","down_25","down_25_to_flat","flat_to_up_25","up_25","up_25_to_flat","flat_to_down_25","down_25","down_25_to_flat","right_turn_5","flat_to_up_25","up_25","up_25_to_flat","flat_to_down_25","down_25","down_25_to_flat","flat_to_up_25","up_25","up_25_to_flat","flat_to_down_25","down_25","down_25_to_flat","flat_to_up_25","up_25","up_25_to_flat","flat_to_down_25","down_25","down_25_to_flat","flat_to_up_25","up_25","up_25_to_flat","flat_to_down_25","down_25","down_25_to_flat","flat_to_up_25","up_25","up_25_to_flat","flat_to_down_25","down_25","down_25_to_flat","b… (1985 chars)

  61. 6.47 banked (3 inversions, 100 airtime). Let me try a 4th barrel from a southwest-shifted start to stay clear of the lake:

  62. demolish
    {"demolished":0}
  63. new_ride
    {"dir":2,"ride_type":51,"x":30,"y":40}
    {"cursor":{"bank":0,"dir":2,"slope":0,"x":30,"y":40,"z":112},"ride_id":0}
  64. place_pieces
    {"pieces":["begin_station","middle_station","middle_station","end_station",{"chain":true,"piece":"flat_to_up_25"},{"chain":true,"piece":"up_25"},{"chain":true,"piece":"up_25"},{"chain":true,"piece":"up_25"},{"chain":true,"piece":"up_25"},{"chain":true,"piece":"up_25"},{"chain":true,"piece":"up_25"},{"chain":true,"piece":"up_25"},{"chain":true,"piece":"up_25"},"up_25_to_flat","flat_to_down_25","down_25","down_25","down_25","down_25","down_25","down_25","down_25","down_25","down_25_to_flat","left_corkscrew_up","right_corkscrew_down","left_corkscrew_up","right_corkscrew_down","left_corkscrew_up","right_corkscrew_down","left_corkscrew_up","right_corkscrew_down"]}
    {"circuit_closed":false,"cursor":{"bank":0,"dir":2,"slope":0,"x":66,"y":52,"z":112},"placed_this_call":32,"total_placed":32}

  65. 4 barrels accepted — at (66,52) dir2. Closing: corner A + leg 2 + corner B:

  66. place_pieces
    {"pieces":["right_turn_5","flat_to_up_25","up_25","up_25_to_flat","flat_to_down_25","down_25","down_25_to_flat","flat_to_up_25","up_25","up_25_to_flat","flat_to_down_25","down_25","down_25_to_flat","flat","flat","flat","right_turn_5"]}
    {"circuit_closed":false,"cursor":{"bank":0,"dir":0,"slope":0,"x":65,"y":32,"z":112},"placed_this_call":17,"total_placed":49}

  67. At (65,32) dir0. Return leg with airtime hills (36 tiles):

  68. place_pieces
    {"pieces":["flat_to_up_25","up_25","up_25_to_flat","flat_to_down_25","down_25","down_25_to_flat","flat_to_up_25","up_25","up_25_to_flat","flat_to_down_25","down_25","down_25_to_flat","flat_to_up_25","up_25","up_25_to_flat","flat_to_down_25","down_25","down_25_to_flat","flat_to_up_25","up_25","up_25_to_flat","flat_to_down_25","down_25","down_25_to_flat","flat_to_up_25","up_25","up_25_to_flat","flat_to_down_25","down_25","down_25_to_flat","brakes","brakes","brakes","flat","flat","flat"]}
    {"circuit_closed":false,"cursor":{"bank":0,"dir":0,"slope":0,"x":29,"y":32,"z":112},"placed_this_call":36,"total_placed":85}
  69. place_pieces
    {"pieces":["right_turn_5","brakes","brakes","brakes","right_turn_5"]}
    {"circuit_closed":true,"cursor":{"bank":0,"dir":2,"slope":0,"x":30,"y":40,"z":112},"placed_this_call":5,"total_placed":90}
  70. finish_and_test
    {"bounds":{"max_tile_x":68,"max_tile_y":52,"max_z":280,"min_tile_x":27,"min_tile_y":32,"min_z":112},"placed_pieces":["begin_station","middle_station","middle_station","end_station","flat_to_up_25","up_25","up_25","up_25","up_25","up_25","up_25","up_25","up_25","up_25_to_flat","flat_to_down_25","down_25","down_25","down_25","down_25","down_25","down_25","down_25","down_25","down_25_to_flat","left_corkscrew_up","right_corkscrew_down","left_corkscrew_up","right_corkscrew_down","left_corkscrew_up","right_corkscrew_down","left_corkscrew_up","right_corkscrew_down","right_turn_5","flat_to_up_25","up_25","up_25_to_flat","flat_to_down_25","down_25","down_25_to_flat","flat_to_up_25","up_25","up_25_to_flat","flat_to_down_25","down_25","down_25_to_flat","flat","flat","flat","right_turn_5","flat_to_up_25","up_25","up_25_to_flat","flat_to_down_25","down_25","down_25_to_flat","flat_to_up_25","up_25","up_25_to_flat","flat_to_down_25","down_25","down_25_to_flat","flat_to_up_25","up_25","up_25_to_flat","flat_to_down_25","down_25","down_25_to_flat","flat_to_up_25","up_25","up_25_to_flat","flat_to_down_25","down_25","down_25_to_flat","flat_to_up_25","up_25","up_25_to_flat","flat_to_down_25","down_25",… (1994 chars)

  71. 6.57 banked (4 inversions). Diminishing returns on barrels. Let me try stronger 60° airtime hills for a final push:

  72. demolish
    {"demolished":0}
  73. new_ride
    {"dir":2,"ride_type":51,"x":30,"y":40}
    {"cursor":{"bank":0,"dir":2,"slope":0,"x":30,"y":40,"z":112},"ride_id":0}
  74. place_pieces
    {"pieces":["begin_station","middle_station","middle_station","end_station",{"chain":true,"piece":"flat_to_up_25"},{"chain":true,"piece":"up_25"},{"chain":true,"piece":"up_25"},{"chain":true,"piece":"up_25"},{"chain":true,"piece":"up_25"},{"chain":true,"piece":"up_25"},{"chain":true,"piece":"up_25"},{"chain":true,"piece":"up_25"},{"chain":true,"piece":"up_25"},"up_25_to_flat","flat_to_down_25","down_25","down_25","down_25","down_25","down_25","down_25","down_25","down_25","down_25_to_flat","left_corkscrew_up","right_corkscrew_down","left_corkscrew_up","right_corkscrew_down","left_corkscrew_up","right_corkscrew_down"]}
    {"circuit_closed":false,"cursor":{"bank":0,"dir":2,"slope":0,"x":63,"y":49,"z":112},"placed_this_call":30,"total_placed":30}

  75. 3 barrels down at (63,49). Adding a 4th barrel:

  76. place_pieces
    {"pieces":["left_corkscrew_up","right_corkscrew_down"]}
    {"circuit_closed":false,"cursor":{"bank":0,"dir":2,"slope":0,"x":66,"y":52,"z":112},"placed_this_call":2,"total_placed":32}

  77. At (66,52) dir2. Closing with steeper 60° airtime hills — corner A + leg 2 + corner B:

  78. place_pieces
    {"pieces":["right_turn_5","flat_to_up_60","up_60_to_flat","flat_to_down_60","down_60_to_flat","flat_to_up_60","up_60_to_flat","flat_to_down_60","down_60_to_flat","flat_to_up_60","up_60_to_flat","flat_to_down_60","down_60_to_flat","flat","flat","flat","right_turn_5"]}
    {"circuit_closed":false,"cursor":{"bank":0,"dir":0,"slope":0,"x":65,"y":32,"z":112},"placed_this_call":17,"total_placed":49}

  79. At (65,32) dir0. Return leg with 60° airtime hills (36 tiles):

  80. place_pieces
    {"pieces":["flat_to_up_60","up_60_to_flat","flat_to_down_60","down_60_to_flat","flat_to_up_60","up_60_to_flat","flat_to_down_60","down_60_to_flat","flat_to_up_60","up_60_to_flat","flat_to_down_60","down_60_to_flat","flat_to_up_60","up_60_to_flat","flat_to_down_60","down_60_to_flat","flat_to_up_60","up_60_to_flat","flat_to_down_60","down_60_to_flat","flat_to_up_60","up_60_to_flat","flat_to_down_60","down_60_to_flat","flat_to_up_60","up_60_to_flat","flat_to_down_60","down_60_to_flat","brakes","brakes","brakes","brakes","brakes","brakes","flat","flat"]}
    {"circuit_closed":false,"cursor":{"bank":0,"dir":0,"slope":0,"x":29,"y":32,"z":112},"placed_this_call":36,"total_placed":85}

  81. At (29,32) dir0 — closing corners:

  82. place_pieces
    {"pieces":["right_turn_5","brakes","brakes","brakes","right_turn_5"]}
    {"circuit_closed":true,"cursor":{"bank":0,"dir":2,"slope":0,"x":30,"y":40,"z":112},"placed_this_call":5,"total_placed":90}
  83. finish_and_test
    {"bounds":{"max_tile_x":68,"max_tile_y":52,"max_z":280,"min_tile_x":27,"min_tile_y":32,"min_z":112},"placed_pieces":["begin_station","middle_station","middle_station","end_station","flat_to_up_25","up_25","up_25","up_25","up_25","up_25","up_25","up_25","up_25","up_25_to_flat","flat_to_down_25","down_25","down_25","down_25","down_25","down_25","down_25","down_25","down_25","down_25_to_flat","left_corkscrew_up","right_corkscrew_down","left_corkscrew_up","right_corkscrew_down","left_corkscrew_up","right_corkscrew_down","left_corkscrew_up","right_corkscrew_down","right_turn_5","flat_to_up_60","up_60_to_flat","flat_to_down_60","down_60_to_flat","flat_to_up_60","up_60_to_flat","flat_to_down_60","down_60_to_flat","flat_to_up_60","up_60_to_flat","flat_to_down_60","down_60_to_flat","flat","flat","flat","right_turn_5","flat_to_up_60","up_60_to_flat","flat_to_down_60","down_60_to_flat","flat_to_up_60","up_60_to_flat","flat_to_down_60","down_60_to_flat","flat_to_up_60","up_60_to_flat","flat_to_down_60","down_60_to_flat","flat_to_up_60","up_60_to_flat","flat_to_down_60","down_60_to_flat","flat_to_up_60","up_60_to_flat","flat_to_down_60","down_60_to_flat","flat_to_up_60","up_60_to_flat","flat_to… (2092 chars)

  84. Excellent — **6.67** excitement, intensity 7.58, airtime jumped to 176, similarity dropped to 0.23. The 60° hills were a big win. Let me confirm my banked best:

  85. best_result
    {"bounds":{"max_tile_x":68,"max_tile_y":52,"max_z":280,"min_tile_x":27,"min_tile_y":32,"min_z":112},"placed_pieces":["begin_station","middle_station","middle_station","end_station","flat_to_up_25","up_25","up_25","up_25","up_25","up_25","up_25","up_25","up_25","up_25_to_flat","flat_to_down_25","down_25","down_25","down_25","down_25","down_25","down_25","down_25","down_25","down_25_to_flat","left_corkscrew_up","right_corkscrew_down","left_corkscrew_up","right_corkscrew_down","left_corkscrew_up","right_corkscrew_down","left_corkscrew_up","right_corkscrew_down","right_turn_5","flat_to_up_60","up_60_to_flat","flat_to_down_60","down_60_to_flat","flat_to_up_60","up_60_to_flat","flat_to_down_60","down_60_to_flat","flat_to_up_60","up_60_to_flat","flat_to_down_60","down_60_to_flat","flat","flat","flat","right_turn_5","flat_to_up_60","up_60_to_flat","flat_to_down_60","down_60_to_flat","flat_to_up_60","up_60_to_flat","flat_to_down_60","down_60_to_flat","flat_to_up_60","up_60_to_flat","flat_to_down_60","down_60_to_flat","flat_to_up_60","up_60_to_flat","flat_to_down_60","down_60_to_flat","flat_to_up_60","up_60_to_flat","flat_to_down_60","down_60_to_flat","flat_to_up_60","up_60_to_flat","flat_to… (2092 chars)

  86. Banked score confirmed: **6.67 excitement**. ## Summary My best coaster this round scores **6.67 excitement** (intensity 7.58, nausea 4.37, similarity just 0.23 — highly original), a solid jump over last round's 6.0. **"Corkscrew Cannon"** — a steel twister that: - Climbs a chain lift, then a full 25° plunge to ground for max speed - Fires through **four corkscrew barrels** back-to-back (4 inversions) - Returns via a long rectangular circuit packed with **eleven steep 60° camelback hills**, generating a huge **176 units of airtime** and strong -1.93 g floater airtime - Closes cleanly back into the station (15 drops, 571-length ride) Key learnings that drove the improvement: each added corkscrew barrel gave diminishing returns (repetition), but swapping the gentle 25° return hills for aggressive **60° camelbacks** was the big lever — it nearly doubled airtime (102→176) and slashed similarity (0.44→0.23) while keeping intensity comfortably under 10.

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