TRACE · ROUND 2

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 2 back to model →
events
57
tool calls
38
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":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)
  6. 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)

  7. I have all four directions' geometry. Now I'll build a two-vertical-loop oval design. Let me start the ride and place stations + lift + first drop + loop 1.

  8. new_ride
    {"dir":2,"ride_type":51,"x":36,"y":46}
    {"cursor":{"bank":0,"dir":2,"slope":0,"x":36,"y":46,"z":112},"ride_id":0}
  9. place_pieces
    {"pieces":[{"piece":"begin_station"},{"piece":"middle_station"},{"piece":"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_to_flat"},{"piece":"flat_to_down_60"},{"piece":"down_60"},{"piece":"down_60_to_flat"},{"piece":"left_vertical_loop"},{"piece":"down_25_to_flat"}]}
    {"circuit_closed":false,"cursor":{"bank":0,"dir":2,"slope":0,"x":52,"y":46,"z":144},"placed_this_call":16,"rejection":{"error":"piece enters at 25-up slope but the track here is flat; add a slope transition piece first","index":16,"piece":"left_vertical_loop"},"total_placed":16}

  10. The vertical loop enters on a 25-up slope. Let me add a slope transition before it.

  11. place_pieces
    {"pieces":[{"piece":"flat_to_up_25"},{"piece":"left_vertical_loop"},{"piece":"down_25_to_flat"}]}
    {"circuit_closed":false,"cursor":{"bank":0,"dir":2,"slope":0,"x":56,"y":47,"z":144},"placed_this_call":3,"total_placed":19}

  12. First loop done. Cursor at rel (20,1,32). Now the first 180° turn and the second loop.

  13. place_pieces
    {"pieces":[{"piece":"left_turn_5"},{"piece":"left_turn_5"},{"piece":"flat_to_up_25"},{"piece":"left_vertical_loop"},{"piece":"down_25_to_flat"}]}
    {"circuit_closed":false,"cursor":{"bank":0,"dir":0,"slope":0,"x":51,"y":51,"z":144},"placed_this_call":5,"total_placed":24}

  14. Now the crest, descent, hop, flat run, and closing 180° turn.

  15. place_pieces
    {"pieces":[{"piece":"flat_to_up_25"},{"piece":"up_25_to_flat"},{"piece":"flat_to_down_25"},{"piece":"down_25_to_flat"},{"piece":"flat_to_down_25"},{"piece":"down_25"},{"piece":"down_25_to_flat"},{"piece":"flat_to_up_25"},{"piece":"up_25_to_flat"},{"piece":"flat_to_down_25"},{"piece":"down_25_to_flat"},{"piece":"flat"},{"piece":"flat"},{"piece":"flat"},{"piece":"flat"},{"piece":"flat"},{"piece":"left_turn_5"},{"piece":"left_turn_5"}]}
    {"circuit_closed":true,"cursor":{"bank":0,"dir":2,"slope":0,"x":36,"y":46,"z":112},"placed_this_call":18,"total_placed":42}

  16. Circuit closed. Let me test it.

  17. finish_and_test
    {"bounds":{"max_tile_x":58,"max_tile_y":52,"max_z":312,"min_tile_x":33,"min_tile_y":46,"min_z":112},"placed_pieces":["begin_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_60","down_60","down_60_to_flat","flat_to_up_25","left_vertical_loop","down_25_to_flat","left_turn_5","left_turn_5","flat_to_up_25","left_vertical_loop","down_25_to_flat","flat_to_up_25","up_25_to_flat","flat_to_down_25","down_25_to_flat","flat_to_down_25","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","left_turn_5","left_turn_5"],"program":null,"rides":[{"average_speed":401406670,"crashed":false,"excitement":null,"highest_drop":13,"id":0,"intensity":null,"max_lateral_g":0.0,"max_negative_g":-0.6200000047683716,"max_positive_g":3.299999952316284,"max_speed":980754,"nausea":null,"num_drops":219,"num_inversions":110,"ride_length":8043,"ride_type":51,"status":"testing","tested":false,"total_air_time":1475}],"similarity":{"common_substring_share":0.16666666666666666,"edit_similarity":0.45238095238095233,"mirrored":true,"nearest_design"… (1330 chars)

  18. The train never settled — it looped many times without the station stopping it (ratings are null). I need a brake run before the station. Let me undo the flat return + closing turns and replace with brakes.

  19. undo_piecerejected
    ride already finalized; use demolish + new_ride

  20. The test finalized the ride. I'll demolish and rebuild with a brake run before the station.

  21. demolish
    {"demolished":0}
  22. new_ride
    {"dir":2,"ride_type":51,"x":36,"y":46}
    {"cursor":{"bank":0,"dir":2,"slope":0,"x":36,"y":46,"z":112},"ride_id":0}
  23. place_pieces
    {"pieces":[{"piece":"begin_station"},{"piece":"middle_station"},{"piece":"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_to_flat"},{"piece":"flat_to_down_60"},{"piece":"down_60"},{"piece":"down_60_to_flat"},{"piece":"flat_to_up_25"},{"piece":"left_vertical_loop"},{"piece":"down_25_to_flat"},{"piece":"left_turn_5"},{"piece":"left_turn_5"},{"piece":"flat_to_up_25"},{"piece":"left_vertical_loop"},{"piece":"down_25_to_flat"},{"piece":"flat_to_up_25"},{"piece":"up_25_to_flat"},{"piece":"flat_to_down_25"},{"piece":"down_25_to_flat"},{"piece":"flat_to_down_25"},{"piece":"down_25"},{"piece":"down_25_to_flat"},{"piece":"flat_to_up_25"},{"piece":"up_25_to_flat"},{"piece":"flat_to_down_25"},{"piece":"down_25_to_flat"},{"piece":"brakes"},{"piece":"brakes"},{"piece":"brakes"},{"piece":"brakes"},{"piece":"brakes"},{"piece":"left_turn_5"},{"piece":"left_turn_5"}]}
    {"circuit_closed":true,"cursor":{"bank":0,"dir":2,"slope":0,"x":36,"y":46,"z":112},"placed_this_call":42,"total_placed":42}
  24. finish_and_test
    {"bounds":{"max_tile_x":58,"max_tile_y":52,"max_z":312,"min_tile_x":33,"min_tile_y":46,"min_z":112},"placed_pieces":["begin_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_60","down_60","down_60_to_flat","flat_to_up_25","left_vertical_loop","down_25_to_flat","left_turn_5","left_turn_5","flat_to_up_25","left_vertical_loop","down_25_to_flat","flat_to_up_25","up_25_to_flat","flat_to_down_25","down_25_to_flat","flat_to_down_25","down_25","down_25_to_flat","flat_to_up_25","up_25_to_flat","flat_to_down_25","down_25_to_flat","brakes","brakes","brakes","brakes","brakes","left_turn_5","left_turn_5"],"program":null,"rides":[{"average_speed":401406670,"crashed":false,"excitement":null,"highest_drop":13,"id":0,"intensity":null,"max_lateral_g":0.0,"max_negative_g":-0.6200000047683716,"max_positive_g":3.299999952316284,"max_speed":980754,"nausea":null,"num_drops":219,"num_inversions":110,"ride_length":8043,"ride_type":51,"status":"testing","tested":false,"total_air_time":1475}],"similarity":{"common_substring_share":0.21428571428571427,"edit_similarity":0.375,"mirrored":false,"nearest_design":"R… (1311 chars)

  25. Same result — the train never stops at the station, so it never finalizes (tested:false, no rating). Let me check the current state and look at it.

  26. best_resultrejected
    no rated test yet this round

  27. The vertical loops are taller than my lift energy can clear — the train stalls (max_z 312 > lift-top 256), so the test never completes. I'll redesign without vertical loops: a moderate lift, a steep drop, airtime hills, and a proper brake run so the train actually stops. Let me bank a working score first.

  28. demolish
    {"demolished":0}
  29. new_ride
    {"dir":2,"ride_type":51,"x":36,"y":46}
    {"cursor":{"bank":0,"dir":2,"slope":0,"x":36,"y":46,"z":112},"ride_id":0}
  30. place_pieces
    {"pieces":[{"piece":"begin_station"},{"piece":"middle_station"},{"piece":"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_to_flat"},{"piece":"flat_to_down_60"},{"piece":"down_60"},{"piece":"down_60_to_flat"},{"piece":"flat_to_up_25"},{"piece":"up_25_to_flat"},{"piece":"flat_to_down_25"},{"piece":"down_25_to_flat"},{"piece":"left_turn_5"},{"piece":"left_turn_5"},{"piece":"flat_to_up_25"},{"piece":"up_25_to_flat"},{"piece":"flat_to_down_25"},{"piece":"down_25_to_flat"},{"piece":"flat_to_up_25"},{"piece":"up_25_to_flat"},{"piece":"flat_to_down_25"},{"piece":"down_25_to_flat"},{"piece":"flat_to_down_25"},{"piece":"down_25_to_flat"},{"piece":"flat_to_up_25"},{"piece":"up_25_to_flat"},{"piece":"flat_to_down_25"},{"piece":"down_25_to_flat"},{"piece":"flat"},{"piece":"flat"},{"piece":"flat"},{"piece":"flat"},{"piece":"flat"},{"piece":"flat"},{"piece":"flat"},{"piece":"flat"},{"piece":"flat"},{"piece":"flat"},{"piece":"flat"},{"piece":"flat"},{… (1417 chars)
    {"circuit_closed":true,"cursor":{"bank":0,"dir":2,"slope":0,"x":36,"y":46,"z":112},"placed_this_call":58,"total_placed":58}
  31. finish_and_test
    {"bounds":{"max_tile_x":57,"max_tile_y":51,"max_z":264,"min_tile_x":25,"min_tile_y":46,"min_z":112},"placed_pieces":["begin_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_60","down_60","down_60_to_flat","flat_to_up_25","up_25_to_flat","flat_to_down_25","down_25_to_flat","left_turn_5","left_turn_5","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_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","flat","flat","flat","flat","flat","flat","flat","flat","left_turn_5","left_turn_5","brakes","brakes","brakes","brakes","brakes","brakes","brakes","brakes"],"program":null,"rides":[{"average_speed":80389,"crashed":false,"excitement":5.710000038146973,"highest_drop":13,"id":0,"intensity":3.9700000286102295,"max_lateral_g":1.4700000286102295,"max_negative_g":-0.4000000059604645,"max_positive_g":3.309999942779541,"max_speed":978380,"nausea":2.2100000381469727,"num_drops":5,"num_inversions":0,"ride_length":313,"ride_type":51,"sta… (1519 chars)

  32. Banked a working score: **excitement 5.71**, intensity only 3.97 (lots of headroom). Now let me add inversions to push excitement higher. Let me get the last direction's geometry to plan corkscrew turns.

  33. 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)

  34. Now I have all geometry. I'll build a version with 4 corkscrew inversions (corkscrews only climb 80, easily cleared) plus the steep drop and airtime hops, keeping the brake run. Let me rebuild.

  35. demolish
    {"demolished":0}
  36. new_ride
    {"dir":2,"ride_type":51,"x":36,"y":46}
    {"cursor":{"bank":0,"dir":2,"slope":0,"x":36,"y":46,"z":112},"ride_id":0}
  37. place_pieces
    {"pieces":[{"piece":"begin_station"},{"piece":"middle_station"},{"piece":"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"},{"chain":true,"piece":"up_25_to_flat"},{"piece":"flat_to_down_60"},{"piece":"down_60"},{"piece":"down_60_to_flat"},{"piece":"flat_to_down_25"},{"piece":"down_25"},{"piece":"down_25_to_flat"},{"piece":"left_corkscrew_up"},{"piece":"left_corkscrew_down"}]}
    {"circuit_closed":false,"cursor":{"bank":0,"dir":0,"slope":0,"x":55,"y":49,"z":128},"placed_this_call":22,"total_placed":22}

  38. CS#1 placed, cursor at rel (19,3,16) as planned. Now the back-leg, second corkscrew turn, and brake run.

  39. place_pieces
    {"pieces":[{"piece":"flat_to_up_25"},{"piece":"up_25_to_flat"},{"piece":"flat_to_down_25"},{"piece":"down_25_to_flat"},{"piece":"flat_to_down_25"},{"piece":"down_25_to_flat"},{"piece":"flat_to_up_25"},{"piece":"up_25_to_flat"},{"piece":"flat_to_down_25"},{"piece":"down_25_to_flat"},{"piece":"flat_to_up_25"},{"piece":"up_25_to_flat"},{"piece":"flat_to_down_25"},{"piece":"down_25_to_flat"},{"piece":"flat_to_up_25"},{"piece":"up_25_to_flat"},{"piece":"flat_to_down_25"},{"piece":"down_25_to_flat"},{"piece":"flat"},{"piece":"flat"},{"piece":"flat"},{"piece":"flat"},{"piece":"flat"},{"piece":"flat"},{"piece":"flat"},{"piece":"flat"},{"piece":"flat"},{"piece":"flat"},{"piece":"left_corkscrew_up"},{"piece":"left_corkscrew_down"},{"piece":"brakes"},{"piece":"brakes"},{"piece":"brakes"},{"piece":"brakes"},{"piece":"brakes"},{"piece":"brakes"},{"piece":"brakes"},{"piece":"brakes"}]}
    {"circuit_closed":true,"cursor":{"bank":0,"dir":2,"slope":0,"x":36,"y":46,"z":112},"placed_this_call":38,"total_placed":60}

  40. Circuit closed with 4 corkscrew inversions. Let me test it.

  41. finish_and_test
    {"bounds":{"max_tile_x":57,"max_tile_y":49,"max_z":296,"min_tile_x":26,"min_tile_y":46,"min_z":112},"placed_pieces":["begin_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_to_flat","flat_to_down_25","down_25","down_25_to_flat","left_corkscrew_up","left_corkscrew_down","flat_to_up_25","up_25_to_flat","flat_to_down_25","down_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","flat","flat","flat","flat","flat","left_corkscrew_up","left_corkscrew_down","brakes","brakes","brakes","brakes","brakes","brakes","brakes","brakes"],"program":null,"rides":[{"average_speed":84418,"crashed":false,"excitement":6.099999904632568,"highest_drop":17,"id":0,"intensity":5.650000095367432,"max_lateral_g":2.3299999237060547,"max_negative_g":-0.6499999761581421,"max_positive_g":4.0,"max_speed":1139819,"nausea":3.0999999046325684,"num_drops":7,"… (1574 chars)

  42. Excitement up to **6.10** (intensity only 5.65 — still lots of headroom). Let me push higher with a taller lift and bigger drop for more speed, keeping the same closed structure from the corkscrew onward.

  43. demolish
    {"demolished":0}
  44. new_ride
    {"dir":2,"ride_type":51,"x":36,"y":46}
    {"cursor":{"bank":0,"dir":2,"slope":0,"x":36,"y":46,"z":112},"ride_id":0}
  45. place_pieces
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    {"circuit_closed":true,"cursor":{"bank":0,"dir":2,"slope":0,"x":36,"y":46,"z":112},"placed_this_call":60,"total_placed":60}

  46. Circuit closed. Let me test this taller version.

  47. finish_and_test
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  48. Excitement 6.15, intensity 6.07 — still room. The 10 flat tiles are dead weight; let me replace 6 of them with an extra 4-corkscrew barrel-roll cluster for more inversions.

  49. demolish
    {"demolished":0}
  50. new_ride
    {"dir":2,"ride_type":51,"x":36,"y":46}
    {"cursor":{"bank":0,"dir":2,"slope":0,"x":36,"y":46,"z":112},"ride_id":0}
  51. place_pieces
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    {"circuit_closed":false,"cursor":{"bank":15,"dir":3,"slope":0,"x":38,"y":47,"z":192},"placed_this_call":39,"rejection":{"error":"Twister Roller Coaster 1 in the way","index":39,"piece":"right_corkscrew_down"},"total_placed":39}

  52. Collision — the barrel-roll cluster swings into the existing track (the two oval legs are too close). That approach won't work without widening the layout, and I'm low on time. My best (6.15) is already banked. Let me restore the clean working v7 design as the final circuit.

  53. demolish
    {"demolished":0}
  54. new_ride
    {"dir":2,"ride_type":51,"x":36,"y":46}
    {"cursor":{"bank":0,"dir":2,"slope":0,"x":36,"y":46,"z":112},"ride_id":0}
  55. place_pieces
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    {"circuit_closed":true,"cursor":{"bank":0,"dir":2,"slope":0,"x":36,"y":46,"z":112},"placed_this_call":60,"total_placed":60}
  56. finish_and_test
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  57. Final circuit confirmed and banked. **Best coaster this round — excitement 6.15** (intensity 6.07, nausea 3.32, no crash). It's a steel twister oval: a 14-piece chain lift to ~208 height units, a steep triple-down_60 plunge (21-unit drop, top speed ~1.26M), a **left corkscrew inversion**, a run of airtime bunny-hops through a 180° corkscrew turn, a **second corkscrew inversion** into an 8-piece brake run back to the station. Similarity to stock designs is 0.40 (below the 0.5 penalty threshold). Key lessons banked for later rounds: vertical loops need the lift top to sit *above* the loop's apex (they stalled the train when it couldn't clear ~160 units of internal rise), a brake run before the station is essential or the train never stops and the test returns no rating, and the two oval legs sit too close in y for corkscrew barrel-roll clusters (they collide with the outbound track).

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