{
  "meta": {
    "built": "2026-09-30T05:41:31.791Z",
    "version": "v1",
    "license": "CC-BY-4.0",
    "source": "https://github.com/bdgroves/hoplove"
  },
  "hop": {
    "slug": "challenger",
    "name": "Challenger",
    "purpose": "dual",
    "country": "GB",
    "international_code": "CHA",
    "kind": "cultivar",
    "ownership": {
      "mark": "public",
      "public_domain": true
    },
    "pedigree": {
      "released": 1972,
      "breeder": "wye",
      "parents": {
        "seed": "northern-brewer",
        "note": "Northern Brewer crossed with a German male."
      },
      "refs": [
        "seed-general-knowledge"
      ]
    },
    "aroma": {
      "summary": "Crisp and green-spicy with cedar and a dry floral edge. Bitters cleanly, which is why it shows up as both the copper addition and the late charge in a lot of English recipes.\n",
      "tags": [
        "spice",
        "cedar",
        "floral",
        "green",
        "tea",
        "earthy"
      ],
      "refs": [
        "seed-general-knowledge"
      ]
    },
    "analytics": {
      "alpha_acid": {
        "unit": "percent",
        "low": 5,
        "high": 9,
        "typical": 7.38,
        "agreement": 0.813,
        "source_count": 2,
        "sources": [
          {
            "id": "hopsteiner",
            "tier": "breeder",
            "low": 5,
            "high": 9,
            "typical": 7,
            "note": "Data sheet last changed 2020-01-09."
          },
          {
            "id": "barthhaas",
            "tier": "breeder",
            "low": 6.5,
            "high": 9,
            "typical": 7.75,
            "note": "Range over the last 4 crop years."
          }
        ]
      },
      "beta_acid": {
        "unit": "percent",
        "low": 2.5,
        "high": 4.3,
        "typical": 3.45,
        "agreement": 0.944,
        "source_count": 2,
        "sources": [
          {
            "id": "hopsteiner",
            "tier": "breeder",
            "low": 3,
            "high": 4,
            "typical": 3.5,
            "note": "Data sheet last changed 2020-01-09."
          },
          {
            "id": "barthhaas",
            "tier": "breeder",
            "low": 2.5,
            "high": 4.3,
            "typical": 3.4,
            "note": "Range over the last 4 crop years."
          }
        ]
      },
      "cohumulone": {
        "unit": "percent_of_alpha",
        "low": 27,
        "high": 30,
        "typical": 28.5,
        "agreement": null,
        "source_count": 1,
        "sources": [
          {
            "id": "hopsteiner",
            "tier": "breeder",
            "low": 27,
            "high": 30,
            "typical": 28.5,
            "note": "Data sheet last changed 2020-01-09."
          }
        ]
      },
      "total_oil": {
        "unit": "ml_per_100g",
        "low": 1,
        "high": 1.5,
        "typical": 1.25,
        "agreement": 1,
        "source_count": 2,
        "sources": [
          {
            "id": "hopsteiner",
            "tier": "breeder",
            "low": 1,
            "high": 1.5,
            "typical": 1.25,
            "note": "Data sheet last changed 2020-01-09."
          },
          {
            "id": "barthhaas",
            "tier": "breeder",
            "low": 1,
            "high": 1.5,
            "typical": 1.25,
            "note": "Range over the last 4 crop years."
          }
        ]
      }
    },
    "usage": {
      "timing": [
        "bittering",
        "late-boil",
        "dry-hop"
      ],
      "beer_styles": [
        "english-bitter",
        "esb",
        "english-ipa",
        "porter",
        "british-brown",
        "american-amber"
      ]
    },
    "products": {
      "cryo": false,
      "lupomax": false
    },
    "substitutes": [
      {
        "slug": "whitbread-golding-variety",
        "confidence": "medium"
      },
      {
        "slug": "aramis",
        "confidence": "medium"
      },
      {
        "slug": "willamette",
        "confidence": "low"
      }
    ],
    "meta": {
      "status": "draft",
      "verification": "corroborated",
      "last_reviewed": "2026-09-27"
    },
    "oils": {
      "myrcene": {
        "unit": "percent_of_total_oil",
        "low": 25,
        "high": 35,
        "typical": 30,
        "agreement": null,
        "source_count": 1,
        "sources": [
          {
            "id": "barthhaas",
            "tier": "breeder",
            "low": 25,
            "high": 35,
            "typical": 30,
            "note": "Range over the last 4 crop years."
          }
        ]
      },
      "humulene": {
        "unit": "percent_of_total_oil",
        "low": 20,
        "high": 25,
        "typical": 22.5,
        "agreement": null,
        "source_count": 1,
        "sources": [
          {
            "id": "barthhaas",
            "tier": "breeder",
            "low": 20,
            "high": 25,
            "typical": 22.5,
            "note": "Range over the last 4 crop years."
          }
        ]
      },
      "farnesene": {
        "unit": "percent_of_total_oil",
        "low": 1,
        "high": 2,
        "typical": 1.5,
        "agreement": null,
        "source_count": 1,
        "sources": [
          {
            "id": "hopsteiner",
            "tier": "breeder",
            "low": 1,
            "high": 2,
            "typical": 1.5,
            "note": "Data sheet last changed 2020-01-09."
          }
        ]
      }
    },
    "forms": null,
    "derived": {
      "alpha_beta_ratio": {
        "value": 2.14,
        "label": "2.1:1"
      },
      "oil_profile": {
        "raw_sum": 54,
        "normalized": null,
        "insufficient": true
      },
      "completeness": 92,
      "cited_sources": [
        "barthhaas",
        "hopsteiner",
        "seed-general-knowledge"
      ],
      "relies_on_unsourced": true
    },
    "beers": [
      {
        "brewery": {
          "slug": "georgetown",
          "name": "Georgetown Brewing",
          "city": "Seattle",
          "state": "WA",
          "url": "https://georgetownbeer.com/"
        },
        "beer": {
          "slug": "bitter-horseman",
          "name": "Bitter Horseman",
          "abv": 4.3
        },
        "fresh": false
      }
    ]
  },
  "similar": [
    {
      "slug": "aramis",
      "score": 0.608,
      "measured_score": 0.697,
      "coverage": 0.7,
      "parts": {
        "chemistry": 0.901,
        "oils": null,
        "aroma": 0.543
      },
      "purpose_shift": "dual to aroma",
      "curated": true,
      "confidence": "medium",
      "note": null,
      "name": "Aramis"
    },
    {
      "slug": "whitbread-golding-variety",
      "score": 0.581,
      "measured_score": 0.659,
      "coverage": 0.7,
      "parts": {
        "chemistry": 0.854,
        "oils": null,
        "aroma": 0.513
      },
      "purpose_shift": null,
      "curated": true,
      "confidence": "medium",
      "note": null,
      "name": "Whitbread Golding Variety"
    },
    {
      "slug": "willamette",
      "score": 0.545,
      "measured_score": 0.707,
      "coverage": 0.7,
      "parts": {
        "chemistry": 0.894,
        "oils": null,
        "aroma": 0.567
      },
      "purpose_shift": "dual to aroma",
      "curated": true,
      "confidence": "low",
      "note": null,
      "name": "Willamette"
    },
    {
      "slug": "lubelski",
      "score": 0.54,
      "measured_score": 0.771,
      "coverage": 0.7,
      "parts": {
        "chemistry": 0.866,
        "oils": null,
        "aroma": 0.7
      },
      "purpose_shift": null,
      "curated": false,
      "name": "Lubelski"
    },
    {
      "slug": "hallertau-mittelfrueh",
      "score": 0.498,
      "measured_score": 0.711,
      "coverage": 0.7,
      "parts": {
        "chemistry": 0.816,
        "oils": null,
        "aroma": 0.633
      },
      "purpose_shift": "dual to aroma",
      "curated": false,
      "name": "Hallertau Mittelfruh"
    },
    {
      "slug": "saaz-cz",
      "score": 0.488,
      "measured_score": 0.697,
      "coverage": 0.7,
      "parts": {
        "chemistry": 0.812,
        "oils": null,
        "aroma": 0.61
      },
      "purpose_shift": "dual to aroma",
      "curated": false,
      "name": "Saaz"
    },
    {
      "slug": "pulawski",
      "score": 0.452,
      "measured_score": 0.645,
      "coverage": 0.7,
      "parts": {
        "chemistry": 0.839,
        "oils": null,
        "aroma": 0.5
      },
      "purpose_shift": "dual to aroma",
      "curated": false,
      "name": "Pulawski"
    },
    {
      "slug": "sovereign",
      "score": 0.45,
      "measured_score": 0.643,
      "coverage": 0.7,
      "parts": {
        "chemistry": 0.864,
        "oils": null,
        "aroma": 0.477
      },
      "purpose_shift": null,
      "curated": false,
      "name": "Sovereign"
    },
    {
      "slug": "tettnang",
      "score": 0.435,
      "measured_score": 0.621,
      "coverage": 0.7,
      "parts": {
        "chemistry": 0.798,
        "oils": null,
        "aroma": 0.489
      },
      "purpose_shift": null,
      "curated": false,
      "name": "Tettnanger"
    },
    {
      "slug": "huell-classic",
      "score": 0.43,
      "measured_score": 0.614,
      "coverage": 0.7,
      "parts": {
        "chemistry": 0.929,
        "oils": null,
        "aroma": 0.378
      },
      "purpose_shift": null,
      "curated": false,
      "name": "Huell Classic"
    },
    {
      "slug": "east-kent-golding",
      "score": 0.423,
      "measured_score": 0.604,
      "coverage": 0.7,
      "parts": {
        "chemistry": 0.844,
        "oils": null,
        "aroma": 0.425
      },
      "purpose_shift": null,
      "curated": false,
      "name": "East Kent Golding"
    },
    {
      "slug": "fuggle",
      "score": 0.423,
      "measured_score": 0.604,
      "coverage": 0.7,
      "parts": {
        "chemistry": 0.869,
        "oils": null,
        "aroma": 0.406
      },
      "purpose_shift": null,
      "curated": false,
      "name": "Fuggle"
    }
  ]
}