← mecheval. / task / a2-l-bracket-01

L-bracket with mounting holes A · A2 · a2-l-bracket-01

bracket · boolean · holes · asymmetric

Prompt

Make an L-shaped mounting bracket. The base lies in the XY plane, occupying x in [0, 50], y in [0, 30], z in [0, 4] (50mm long, 30mm wide, 4mm thick). A vertical wall stands on the +X edge: x in [46, 50], y in [0, 30], z in [4, 30] (4mm thick, 30mm wide, rising to z = 30). Two through-holes of diameter 5mm pierce the base parallel to Z, centered at (10, 15) and (35, 15) on the top face. Output a single solid.

Checks

0
valid_solid
{
  "type": "valid_solid"
}
1
bbox
{
  "type": "bbox",
  "min": [
    0,
    0,
    0
  ],
  "max": [
    50,
    30,
    30
  ],
  "tolerance_mm": 0.1
}
2
mass_props
{
  "type": "mass_props",
  "volume_mm3": 8962.92,
  "tolerance_pct": 0.5
}
3
hole_count
{
  "type": "hole_count",
  "diameter_mm": 5,
  "expected": 2,
  "diameter_tolerance_mm": 0.05
}
4
hole_positions
{
  "type": "hole_positions",
  "diameter_mm": 5,
  "positions": [
    [
      10,
      15,
      0
    ],
    [
      35,
      15,
      0
    ]
  ],
  "tolerance_mm": 0.1
}
5
step_roundtrip
{
  "type": "step_roundtrip",
  "tolerance_pct": 0.1
}

Anti-cheese

{
  "max_solid_count": 1
}

Limits

{
  "max_tokens": 60000,
  "max_wallclock_sec": 300,
  "max_tool_calls": 50
}

Recent attempts

Runs (6)

modelrun statusscoretokenswall
claude-direct-claude-opus-4-7 20260428T153537Z-3a65 PASS 1.00 1.5k 5.9s
claude-direct-claude-opus-4-7 20260428T153525Z-a46b PASS 1.00 1.6k 6.8s
claude-direct-claude-opus-4-7 20260428T153513Z-ac6b PASS 1.00 1.6k 6.7s
claude-mcp-claude-opus-4-7 20260428T145833Z-d1a8 fail 0.17 973.8k 138.2s
claude-direct-claude-opus-4-7 20260428T142504Z-02a4 PASS 1.00 1.6k 7.2s
claude-direct-claude-opus-4-7 20260428T141643Z-2876 PASS 1.00 1.6k 6.8s
drawing
mecheval.
sheet
TASK · a2-l-bracket-01
scale
6 runs
date
2026-04-28
drawn by
muni
project
mecheval

generated 2026-04-28T21:00:04.652Z · static site, regenerate with npm run build -w @mecheval/leaderboard