TRACE · ROUND 6

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 6 back to model →
events
75
tool calls
48
rejected
2
session
0:00
Session trace

  1. I'll start by loading the coaster tools.

  2. 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,demolish,screenshot"}
    No matching deferred tools found
  3. ToolSearch
    {"max_results":20,"query":"coaster ride place piece station"}
  4. 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)
  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. Now I understand the catalog. Let me start building. I'll begin with a station facing -x (dir 0) from a spot clear of the lake.

  7. new_ride
    {"dir":0,"ride_type":51,"x":60,"y":45}
    {"cursor":{"bank":0,"dir":0,"slope":0,"x":60,"y":45,"z":112},"ride_id":0}
  8. 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"]}
    {"circuit_closed":false,"cursor":{"bank":0,"dir":0,"slope":0,"x":47,"y":45,"z":240},"placed_this_call":13,"total_placed":13}

  9. Good, lift is up 8 tiles (z=240). Now the first drop:

  10. place_pieces
    {"pieces":["flat_to_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":0,"slope":0,"x":39,"y":45,"z":128},"placed_this_call":8,"total_placed":21}

  11. Now a vertical loop for an inversion:

  12. place_piecerejected
    {"piece":"left_vertical_loop"}
    'left_vertical_loop' rejected: piece enters at 25-up slope but the track here is flat; add a slope transition piece first (cursor unchanged: {"bank":0,"dir":0,"slope":0,"x":39,"y":45,"z":128})
  13. place_piece
    {"piece":"flat_to_up_25"}
    {"circuit_closed":false,"cost":700,"cursor":{"bank":0,"dir":0,"slope":2,"x":38,"y":45,"z":136},"pieces_placed":22,"placed":"flat_to_up_25"}
  14. place_piece
    {"piece":"left_vertical_loop"}
    {"circuit_closed":false,"cost":5700,"cursor":{"bank":0,"dir":0,"slope":6,"x":36,"y":44,"z":136},"pieces_placed":23,"placed":"left_vertical_loop"}

  15. Vertical loop in. Now level out and check state:

  16. place_piece
    {"piece":"down_25_to_flat"}
    {"circuit_closed":false,"cost":700,"cursor":{"bank":0,"dir":0,"slope":0,"x":35,"y":44,"z":128},"pieces_placed":24,"placed":"down_25_to_flat"}

  17. Let me get geometry for the other directions to plan the return leg.

  18. 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)
  19. 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)

  20. I have all four directions mapped. I've planned a full closure back to (60,45,112,dir0). Let me place the return leg:

  21. place_pieces
    {"pieces":["right_turn_5","right_turn_5","flat_to_down_25","down_25_to_flat","s_bend_left","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"]}
    {"circuit_closed":false,"cursor":{"bank":0,"dir":2,"slope":0,"x":49,"y":50,"z":112},"placed_this_call":13,"total_placed":37}

  22. On plan (49,50,112). Continue with 3 more hops, then the closing U-turn:

  23. place_pieces
    {"pieces":["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_to_flat","flat_to_down_25","down_25_to_flat","flat","right_turn_5","right_turn_5","flat"]}
    {"circuit_closed":true,"cursor":{"bank":0,"dir":0,"slope":0,"x":60,"y":45,"z":112},"placed_this_call":16,"total_placed":53}

  24. Circuit closed at exactly (60,45,112,dir0). Let me bank a test score:

  25. finish_and_test
    {"bounds":{"max_tile_x":64,"max_tile_y":50,"max_z":296,"min_tile_x":33,"min_tile_y":44,"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_to_flat","flat_to_up_25","left_vertical_loop","down_25_to_flat","right_turn_5","right_turn_5","flat_to_down_25","down_25_to_flat","s_bend_left","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_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_to_flat","flat_to_down_25","down_25_to_flat","flat","right_turn_5","right_turn_5","flat"],"program":null,"rides":[{"average_speed":386712994,"crashed":false,"excitement":null,"highest_drop":14,"id":0,"intensity":null,"max_lateral_g":0.0,"max_negative_g":-0.9100000262260437,"max_positive_g":2.4000000953674316,"max_speed":986509,"nausea":null,"num_drops":160,"num_inversions":80,"ride_length":7739,"ride_t… (1526 chars)

  26. The test returned null ratings (tested:false) with bogus numbers — the train seems to be circulating without completing a rated lap. Let me re-run the test:

  27. finish_and_test
    {"ticks":50000}
    {"bounds":{"max_tile_x":64,"max_tile_y":50,"max_z":296,"min_tile_x":33,"min_tile_y":44,"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_to_flat","flat_to_up_25","left_vertical_loop","down_25_to_flat","right_turn_5","right_turn_5","flat_to_down_25","down_25_to_flat","s_bend_left","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_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_to_flat","flat_to_down_25","down_25_to_flat","flat","right_turn_5","right_turn_5","flat"],"program":null,"rides":[{"average_speed":1169649312,"crashed":false,"excitement":null,"highest_drop":14,"id":0,"intensity":null,"max_lateral_g":0.0,"max_negative_g":-0.9100000262260437,"max_positive_g":2.4000000953674316,"max_speed":986509,"nausea":null,"num_drops":255,"num_inversions":246,"ride_length":23420,"rid… (1529 chars)

  28. The train never stops at the station — I have no brakes to slow it, so it circulates forever and the test never completes. I need braking track before the station. Let me undo the closing tail and rebuild it with a braking straight:

  29. undo_piecerejected
    ride already finalized; use demolish + new_ride

  30. The finish finalized the ride and I have no valid score yet (ratings were null). I'll demolish and rebuild the same layout but with a braking straight before the station so the train actually stops.

  31. demolish
    {"demolished":0}
  32. new_ride
    {"dir":0,"ride_type":51,"x":60,"y":45}
    {"cursor":{"bank":0,"dir":0,"slope":0,"x":60,"y":45,"z":112},"ride_id":0}
  33. 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_to_flat","flat_to_up_25","left_vertical_loop","down_25_to_flat","right_turn_5","right_turn_5","flat_to_down_25","down_25_to_flat","s_bend_left","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_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_to_flat","flat_to_down_25","down_25_to_flat","flat","flat","flat","flat","flat","right_turn_5","right_turn_5","brakes","brakes","brakes","brakes","brakes"]}
    {"circuit_closed":true,"cursor":{"bank":0,"dir":0,"slope":0,"x":60,"y":45,"z":112},"placed_this_call":61,"total_placed":61}

  34. Circuit closed with a braking straight. Now test:

  35. finish_and_test
    {"bounds":{"max_tile_x":68,"max_tile_y":50,"max_z":296,"min_tile_x":33,"min_tile_y":44,"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_to_flat","flat_to_up_25","left_vertical_loop","down_25_to_flat","right_turn_5","right_turn_5","flat_to_down_25","down_25_to_flat","s_bend_left","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_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_to_flat","flat_to_down_25","down_25_to_flat","flat","flat","flat","flat","flat","right_turn_5","right_turn_5","brakes","brakes","brakes","brakes","brakes"],"program":null,"rides":[{"average_speed":386712994,"crashed":false,"excitement":null,"highest_drop":14,"id":0,"intensity":null,"max_lateral_g":0.0,"max_negative_g":-0.9100000262260437,"max_positive_g":2.4000000953674316,"max_speed":986509,"nausea":n… (1589 chars)

  36. Adding brakes changed nothing — the sim output is byte-identical, which means the `left_vertical_loop` piece is producing a broken physics state (garbage speed, train never completes). Let me confirm by rebuilding without the loop, and this also banks a real score. I'll replace the loop with flat track of the same displacement.

  37. demolish
    {"demolished":0}
  38. new_ride
    {"dir":0,"ride_type":51,"x":60,"y":45}
    {"cursor":{"bank":0,"dir":0,"slope":0,"x":60,"y":45,"z":112},"ride_id":0}
  39. 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_to_flat","s_bend_left","flat","right_turn_5","right_turn_5","flat_to_down_25","down_25_to_flat","s_bend_left","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_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_to_flat","flat_to_down_25","down_25_to_flat","flat","flat","flat","flat","flat","right_turn_5","right_turn_5","brakes","brakes","brakes","brakes","brakes"]}
    {"circuit_closed":true,"cursor":{"bank":0,"dir":0,"slope":0,"x":60,"y":45,"z":112},"placed_this_call":60,"total_placed":60}
  40. finish_and_test
    {"bounds":{"max_tile_x":68,"max_tile_y":50,"max_z":264,"min_tile_x":33,"min_tile_y":44,"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_to_flat","s_bend_left","flat","right_turn_5","right_turn_5","flat_to_down_25","down_25_to_flat","s_bend_left","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_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_to_flat","flat_to_down_25","down_25_to_flat","flat","flat","flat","flat","flat","right_turn_5","right_turn_5","brakes","brakes","brakes","brakes","brakes"],"program":null,"rides":[{"average_speed":150565,"crashed":false,"excitement":5.75,"highest_drop":14,"id":0,"intensity":4.010000228881836,"max_lateral_g":1.5700000524520874,"max_negative_g":-0.47999998927116394,"max_positive_g":2.4200000762939453,"max_speed":1032196,"nausea":2.230000… (1578 chars)

  41. Confirmed — `left_vertical_loop` was the culprit (garbage physics). Now I have a real banked score: **excitement 5.75**, intensity 4.01. Plenty of headroom (intensity can go to ~10). Corkscrews are proven to work, so let me rebuild with inversions and a bigger drop to boost excitement.

  42. demolish
    {"demolished":0}
  43. new_ride
    {"dir":0,"ride_type":51,"x":60,"y":45}
    {"cursor":{"bank":0,"dir":0,"slope":0,"x":60,"y":45,"z":112},"ride_id":0}
  44. 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_to_flat"]}
    {"circuit_closed":false,"cursor":{"bank":0,"dir":0,"slope":0,"x":35,"y":45,"z":128},"placed_this_call":25,"total_placed":25}

  45. 10-tile lift, big drop to z=128, at (35,45). Now the first corkscrew pair (2 inversions):

  46. place_pieces
    {"pieces":["left_corkscrew_up","right_corkscrew_down"]}
    {"circuit_closed":false,"cursor":{"bank":0,"dir":0,"slope":0,"x":32,"y":42,"z":128},"placed_this_call":2,"total_placed":27}

  47. Two inversions done, at (32,42,128). Now U-turn to head back east, and descend toward base:

  48. place_pieces
    {"pieces":["right_turn_5","right_turn_5","flat_to_down_25","down_25_to_flat"]}
    {"circuit_closed":false,"cursor":{"bank":0,"dir":2,"slope":0,"x":35,"y":47,"z":112},"placed_this_call":4,"total_placed":31}

  49. Now the second corkscrew pair (2 more inversions, total 4) at the fastest point:

  50. place_pieces
    {"pieces":["left_corkscrew_up","right_corkscrew_down"]}
    {"circuit_closed":false,"cursor":{"bank":0,"dir":2,"slope":0,"x":38,"y":50,"z":112},"placed_this_call":2,"total_placed":33}

  51. Four inversions placed, at (38,50,112) heading east. Now the airtime return leg with bunny hops (including steeper 60° pops), then the closing U-turn and brakes:

  52. place_pieces
    {"pieces":["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_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_to_flat","flat_to_down_25","down_25_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","right_turn_5","brakes","brakes","brakes","brakes","brakes","brakes","brakes","brakes"]}
    {"circuit_closed":true,"cursor":{"bank":0,"dir":0,"slope":0,"x":60,"y":45,"z":112},"placed_this_call":41,"total_placed":74}

  53. Circuit closed at exactly (60,45,112,dir0). Let me test this 4-inversion design:

  54. finish_and_test
    {"bounds":{"max_tile_x":71,"max_tile_y":50,"max_z":296,"min_tile_x":30,"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","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","right_turn_5","right_turn_5","flat_to_down_25","down_25_to_flat","left_corkscrew_up","right_corkscrew_down","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_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_to_flat","flat_to_down_25","down_25_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","right_turn_5","brakes","brakes","brakes","brakes","brakes","brakes","brakes","brakes"],"program":null,"rides":[{"average_speed":115606… (1823 chars)

  55. Excitement improved to **6.47** (banked), intensity 6.68 with headroom. The sim counts each corkscrew pair as 1 inversion (so 2 pairs = 2 inversions). Let me push further: add a third corkscrew pair and more steep airtime hills. Rebuilding:

  56. demolish
    {"demolished":0}
  57. new_ride
    {"dir":0,"ride_type":51,"x":60,"y":45}
    {"cursor":{"bank":0,"dir":0,"slope":0,"x":60,"y":45,"z":112},"ride_id":0}
  58. 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_to_flat","left_corkscrew_up","right_corkscrew_down","right_turn_5","right_turn_5","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":41,"y":53,"z":112},"placed_this_call":35,"total_placed":35}

  59. Three corkscrew pairs in, at (41,53,112). Now the closing leg: shift back to y=50, steep airtime hills, U-turn, brakes:

  60. place_pieces
    {"pieces":["s_bend_right","s_bend_right","s_bend_right","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","right_turn_5","right_turn_5","brakes","brakes","brakes","brakes","brakes","brakes"]}
    {"circuit_closed":true,"cursor":{"bank":0,"dir":0,"slope":0,"x":60,"y":45,"z":112},"placed_this_call":28,"total_placed":63}

  61. Circuit closed. Testing the 3-inversion version with steep airtime hills:

  62. finish_and_test
    {"bounds":{"max_tile_x":69,"max_tile_y":53,"max_z":296,"min_tile_x":30,"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","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","right_turn_5","right_turn_5","flat_to_down_25","down_25_to_flat","left_corkscrew_up","right_corkscrew_down","left_corkscrew_up","right_corkscrew_down","s_bend_right","s_bend_right","s_bend_right","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","right_turn_5","right_turn_5","brakes","brakes","brakes","brakes","brakes","brakes"],"program":null,"rides":[{"average_speed":156029,"crashed":false,"excitement":6.550000190734863,"highest_drop":18,"id":0,"intensity":6.840000152587891,"max_lateral_g":2.4000000953674316,"max_negat… (1661 chars)

  63. Excitement 6.55 (new best), 3 inversions. The 60° hops gave *less* airtime (70 vs 93) — airtime drives excitement, so the gentler 25° hops were better. Let me swap the 60° hops back to 25° hops (same footprint, closure preserved) while keeping 3 inversions:

  64. demolish
    {"demolished":0}
  65. new_ride
    {"dir":0,"ride_type":51,"x":60,"y":45}
    {"cursor":{"bank":0,"dir":0,"slope":0,"x":60,"y":45,"z":112},"ride_id":0}
  66. 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_to_flat","left_corkscrew_up","right_corkscrew_down","right_turn_5","right_turn_5","flat_to_down_25","down_25_to_flat","left_corkscrew_up","right_corkscrew_down","left_corkscrew_up","right_corkscrew_down","s_bend_right","s_bend_right","s_bend_right","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_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","right_turn_5","right_turn_5","brakes","brakes","brakes","brakes","brakes","brakes"]}
    {"circuit_closed":true,"cursor":{"bank":0,"dir":0,"slope":0,"x":60,"y":45,"z":112},"placed_this_call":63,"total_placed":63}
  67. finish_and_test
    {"bounds":{"max_tile_x":69,"max_tile_y":53,"max_z":296,"min_tile_x":30,"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","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","right_turn_5","right_turn_5","flat_to_down_25","down_25_to_flat","left_corkscrew_up","right_corkscrew_down","left_corkscrew_up","right_corkscrew_down","s_bend_right","s_bend_right","s_bend_right","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_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","right_turn_5","right_turn_5","brakes","brakes","brakes","brakes","brakes","brakes"],"program":null,"rides":[{"average_speed":153514,"crashed":false,"excitement":6.400000095367432,"highest_drop":18,"id":0,"intensity":6.289999961853027,"max_lateral_g":2.4000000953674316,"max_negat… (1677 chars)

  68. Airtime dropped to 53 and excitement to 6.40 — at high speed the gentle 25° hops give no float (neg G only -0.66). The 60° hops (6.55) were better. My best (6.55) is safely banked. Let me try the 60° version with an extra airtime hill for one more push:

  69. demolish
    {"demolished":0}
  70. new_ride
    {"dir":0,"ride_type":51,"x":60,"y":45}
    {"cursor":{"bank":0,"dir":0,"slope":0,"x":60,"y":45,"z":112},"ride_id":0}
  71. 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_to_flat","left_corkscrew_up","right_corkscrew_down","right_turn_5","right_turn_5","flat_to_down_25","down_25_to_flat","left_corkscrew_up","right_corkscrew_down","left_corkscrew_up","right_corkscrew_down","s_bend_right","s_bend_right","s_bend_right","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","right_turn_5","right_turn_5","brakes","brakes","brakes","brakes","brakes","brakes","brakes","b… (1217 chars)
    {"circuit_closed":true,"cursor":{"bank":0,"dir":0,"slope":0,"x":60,"y":45,"z":112},"placed_this_call":69,"total_placed":69}
  72. finish_and_test
    {"bounds":{"max_tile_x":72,"max_tile_y":53,"max_z":296,"min_tile_x":30,"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","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","right_turn_5","right_turn_5","flat_to_down_25","down_25_to_flat","left_corkscrew_up","right_corkscrew_down","left_corkscrew_up","right_corkscrew_down","s_bend_right","s_bend_right","s_bend_right","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","right_turn_5","right_turn_5","brakes","brakes","brakes","brakes","brakes","brakes","brakes","brakes","brakes"],"program":null,"rides":[{"average_speed":109944,"crashed":false,"excitement":6.559999942779541,"highest_dro… (1733 chars)

  73. Excitement **6.56** — a new best, with 87 airtime, 3 inversions, intensity 6.87, and low similarity (0.28). Let me confirm the banked best:

  74. best_result
    {"bounds":{"max_tile_x":72,"max_tile_y":53,"max_z":296,"min_tile_x":30,"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","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","right_turn_5","right_turn_5","flat_to_down_25","down_25_to_flat","left_corkscrew_up","right_corkscrew_down","left_corkscrew_up","right_corkscrew_down","s_bend_right","s_bend_right","s_bend_right","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","right_turn_5","right_turn_5","brakes","brakes","brakes","brakes","brakes","brakes","brakes","brakes","brakes"],"program":null,"rides":[{"average_speed":109944,"crashed":false,"excitement":6.559999942779541,"highest_dro… (1733 chars)

  75. My best is banked and standing. Final summary: **Best coaster — "Triple Twist" (excitement 6.56):** A steel twister that climbs a 10-tile chained lift, plunges through a ~9-tile first drop, then hits **three corkscrew inversions**, a 180° hairpin, and a run of five steep 60° airtime hills (87 units of air, −2.0 g float) before braking home. - **Excitement 6.56** / Intensity 6.87 (well under the 10 danger line) / Nausea 3.8 — no crash, clean stop at the station. - **Similarity just 0.28** (nearest: *El Condor*) — comfortably original, no score penalty. Key lessons this round: `left_vertical_loop` produced broken physics (garbage speed, train circulated forever, null ratings), so I switched to corkscrews for inversions; and at high speed the steep 60° hops delivered far more airtime — hence more excitement — than gentle 25° hops.

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