{
  "name": "golomb_n6__v3_nh",
  "problem_type": "golomb",
  "params": {
    "n": 6
  },
  "prompt": "Find a Golomb ruler with 6 marks. A Golomb ruler is a set of 6 integers (marks) such that all pairwise distances between marks are unique. The first mark should be at position 0.\n\nReturn a list of 6 integers in increasing order representing the mark positions, or state \"UNSATISFIABLE\" if no solution exists.",
  "satisfiable": true,
  "solution": {
    "x": [
      0,
      1,
      4,
      10,
      12,
      17
    ]
  },
  "difficulty": {
    "solve_time_ms": 1442.1,
    "search_space": 2565726409,
    "num_variables": 6,
    "num_constraints": 5,
    "num_edges": -1,
    "backend": "pycsp",
    "solve_tier": "hard",
    "solve_pct_global": 85.9,
    "solve_pct_type": 25.0
  },
  "partial_assignment": null
}