{
  "domain": "computer-science",
  "topics": [
    "constraint-programming",
    "combinatorics"
  ],
  "type": "construction",
  "also": [
    "proof"
  ],
  "source": {
    "key": "csplib",
    "name": "CSPLib",
    "url": "https://www.csplib.org/Problems/prob010/",
    "id": "prob010",
    "curator": "CSPLib editors",
    "poser": "Warwick Harvey",
    "status": "open",
    "as_of": "2026-10-20",
    "catalog": "0521c19bbd38"
  }
}