{
  "title": "Field-guide card: haberdasher's puzzle",
  "description": "Field-guide card for the haberdasher's puzzle: name, classification, generating rule, first record, diagram and how it was checked.",
  "license": "CC BY 4.0",
  "license_url": "https://creativecommons.org/licenses/by/4.0/",
  "creator": "Drawn Mathematics",
  "page": "https://drawnmathematics.com/puzzles/haberdashers-puzzle/",
  "derived_from": [
    "Values from the exact check of both shapes (haberdashers-puzzle-pieces.csv); dates and name as noted in the source column"
  ],
  "method": "Compiled by Drawn Mathematics from the data listed",
  "data_credit": [
    "Computed for this page from Dudeney's construction; first record as given by Demaine, Kamata and Uehara, arXiv:2412.03865 v4 (2025), and Dudeney, The Canterbury Puzzles (1919 edition)"
  ]
}