diff --git a/gerbil-manager-web/src/genetics/__tests__/genetics.test.ts b/gerbil-manager-web/src/genetics/__tests__/genetics.test.ts
index 799eddf..9da7ca6 100644
--- a/gerbil-manager-web/src/genetics/__tests__/genetics.test.ts
+++ b/gerbil-manager-web/src/genetics/__tests__/genetics.test.ts
@@ -179,10 +179,11 @@ describe('Farbschlag catalog', () => {
     expect(match.name).toBe('Unbekannter Farbschlag')
   })
 
-  it('has the expected catalogue coverage (GEN-3f: 61 after cchm CP reconciliation)', () => {
-    // GEN-3f collapsed the 24 portal cchm colourpoint rows to 12 breeder-named
-    // varieties (Marder/Siam/Zobel/Zobel-Hell + CP-<base>), so 73 -> 61.
-    expect(CATALOG_SIZE).toBe(61)
+  it('has the expected catalogue coverage (GEN-3g: 66 after adding CP-*-Hell het variants)', () => {
+    // GEN-3f: 73 -> 61 (cchm CP reconciliation).
+    // GEN-3g: +5 het variants (CP-Agouti/Silberagouti/Algierfuchs/Polarfuchs/Orangeschimmel -Hell),
+    // giving 61 + 5 = 66. CP-Fuchs-Hell was already counted.
+    expect(CATALOG_SIZE).toBe(66)
   })
 
   it('frozen contract names round-trip to themselves (DB-key guard)', () => {
@@ -414,8 +415,12 @@ describe('GEN-3e: C-locus colourpoint naming', () => {
     expect(name('AA cchmcchm DD EE GG PP spsp rere')).toBe('CP-Agouti')
   })
 
-  it('A- + cchm/ch -> CP-<base colour>', () => {
-    expect(name('AA cchmch DD EE GG PP spsp rere')).toBe('CP-Agouti')
+  it('A- + cchm/ch -> CP-<base colour>-Hell (GEN-3g: het gets -Hell suffix)', () => {
+    expect(name('AA cchmch DD EE GG PP spsp rere')).toBe('CP-Agouti-Hell')
+    expect(name('AA cchmch DD EE gg PP spsp rere')).toBe('CP-Silberagouti-Hell')
+    expect(name('AA cchmch DD ee GG PP spsp rere')).toBe('CP-Algierfuchs-Hell')
+    expect(name('AA cchmch DD ee gg PP spsp rere')).toBe('CP-Polarfuchs-Hell')
+    expect(name('AA cchmch dd ee GG PP spsp rere')).toBe('CP-Fuchs-Hell')
   })
 
   it('aa fixed colourpoint names (Marder/Siam/Zobel/Zobel-Hell)', () => {
@@ -471,10 +476,50 @@ describe('GEN-3f: CP catalog reconciled to the breeder CP- naming (matches her l
     expect(name('AA cchmcchm DD efef GG PP spsp rere')).toBe('CP-Orangeschimmel')
   })
 
-  it('het cchm/ch colourpoints (Siam, Zobel-Hell) resolve to their own names', () => {
+  it('het cchm/ch colourpoints (Siam, Zobel-Hell, CP-*-Hell) resolve to their own names', () => {
     const siam = BASE_COLORS.find((e) => e.name === 'Siam')!
     const zh = BASE_COLORS.find((e) => e.name === 'Zobel-Hell')!
+    const cpah = BASE_COLORS.find((e) => e.name === 'CP-Agouti-Hell')!
+    const cpfh = BASE_COLORS.find((e) => e.name === 'CP-Fuchs-Hell')!
     expect(genotypeToFarbschlag(representativeGenotype(siam))).toBe('Siam')
     expect(genotypeToFarbschlag(representativeGenotype(zh))).toBe('Zobel-Hell')
+    expect(genotypeToFarbschlag(representativeGenotype(cpah))).toBe('CP-Agouti-Hell')
+    expect(genotypeToFarbschlag(representativeGenotype(cpfh))).toBe('CP-Fuchs-Hell')
+  })
+})
+
+describe('GEN-3g: "-Hell" in variety name == cchm/ch het; hom == cchm/cchm', () => {
+  const name = (s: string) => genotypeToFarbschlag(fromDisplayString(s))
+  const has = (n: string) => BASE_COLORS.some((e) => e.name === n)
+
+  it('all new -Hell het entries exist in catalog', () => {
+    for (const n of [
+      'CP-Agouti-Hell', 'CP-Silberagouti-Hell', 'CP-Algierfuchs-Hell',
+      'CP-Polarfuchs-Hell', 'CP-Orangeschimmel-Hell',
+    ]) {
+      expect(has(n)).toBe(true)
+    }
+  })
+
+  it('engine correctly maps het (cchm/ch) to -Hell suffix for all A- bases', () => {
+    expect(name('AA cchmch DD EE GG PP spsp rere')).toBe('CP-Agouti-Hell')
+    expect(name('AA cchmch DD EE gg PP spsp rere')).toBe('CP-Silberagouti-Hell')
+    expect(name('AA cchmch DD ee GG PP spsp rere')).toBe('CP-Algierfuchs-Hell')
+    expect(name('AA cchmch DD ee gg PP spsp rere')).toBe('CP-Polarfuchs-Hell')
+    expect(name('AA cchmch dd ee GG PP spsp rere')).toBe('CP-Fuchs-Hell')
+    expect(name('AA cchmch DD efef GG PP spsp rere')).toBe('CP-Orangeschimmel-Hell')
+  })
+
+  it('hom (cchm/cchm) still maps without -Hell suffix', () => {
+    expect(name('AA cchmcchm DD EE GG PP spsp rere')).toBe('CP-Agouti')
+    expect(name('AA cchmcchm DD EE gg PP spsp rere')).toBe('CP-Silberagouti')
+    expect(name('AA cchmcchm DD efef GG PP spsp rere')).toBe('CP-Orangeschimmel')
+  })
+
+  it('aa non-agouti branch is unchanged (Marder/Siam/Zobel/Zobel-Hell)', () => {
+    expect(name('aa cchmcchm DD EE GG PP spsp rere')).toBe('Marder')
+    expect(name('aa cchmch DD EE GG PP spsp rere')).toBe('Siam')
+    expect(name('aa cchmcchm DD EE gg PP spsp rere')).toBe('Zobel')
+    expect(name('aa cchmch DD EE gg PP spsp rere')).toBe('Zobel-Hell')
   })
 })
diff --git a/gerbil-manager-web/src/genetics/catalog.ts b/gerbil-manager-web/src/genetics/catalog.ts
index 49fee37..677c733 100644
--- a/gerbil-manager-web/src/genetics/catalog.ts
+++ b/gerbil-manager-web/src/genetics/catalog.ts
@@ -107,27 +107,29 @@ export const BASE_COLORS: readonly FarbschlagEntry[] = [
   { name: 'Topas dd', tokens: { A: 'A', C: 'C', D: 'd', E: 'E', G: 'G', P: 'p' }, image: 'topas-dd.jpg' },
   { name: 'Blaufuchs dd', tokens: { A: 'a', C: 'C', D: 'd', E: 'e', G: 'g', P: 'p' }, image: 'blaufuchs-dd.jpg' },
 
-  // ── GEN-3f: c^chm colourpoint varieties, reconciled to the breeder's CP- naming ──
-  // The merged GEN-3e colourpointName() rule is authoritative: aa points are the
-  // marten/sable group (Marder/Siam, +gg Zobel/Zobel-Hell — E and D irrelevant);
-  // A- points take the 'CP-<base colour>' prefix and the '-Hell' shade variants
-  // collapse (other loci irrelevant for the CP prefix). These names == the strings
-  // in her live data (god: extract animals.json) so the re-import name-matches and
-  // the Farbschlag mismatch hint stops. The het cchm/ch points (Siam, Zobel-Hell,
-  // CP-Fuchs-Hell) use the 'cchm/ch' pair token. The agouti fox/dilute points
-  // (CP-Fuchs/CP-Blaufuchs) resolve through the engine's E-family fallback to
-  // 'CP-Fuchs'; their distinct dropdown names remain for hand-pick + import match.
+  // ── GEN-3f/3g: c^chm colourpoint varieties ──
+  // GEN-3f: aa points = marten/sable group (Marder/Siam, +gg Zobel/Zobel-Hell).
+  // GEN-3g (breeder rule): '-Hell' == cchm/ch het; no '-Hell' == cchm/cchm hom.
+  // A- points: hom -> 'CP-<base>', het -> 'CP-<base>-Hell' (colourpointName()).
+  // CP-Fuchs is a Sammelbegriff (unknown loci); its -Hell het = CP-Fuchs-Hell.
+  // CP-Blaufuchs (D:d, G:g) still resolves engine-side to 'CP-Fuchs' (dd/gg
+  // fox CP has no dedicated base entry); kept for import name-match + hand-pick.
   { name: 'Marder', tokens: { A: 'a', C: 'cchm', D: 'D', E: 'E', G: 'G', P: 'P' }, image: 'marder.JPG' },
   { name: 'Siam', tokens: { A: 'a', C: 'cchm/ch', D: 'D', E: 'E', G: 'G', P: 'P' }, image: 'siam-marder-hell.JPG' },
   { name: 'Zobel-Hell', tokens: { A: 'a', C: 'cchm/ch', D: 'D', E: 'E', G: 'g', P: 'P' }, image: 'zobel-hell.jpg' },
   { name: 'CP-Agouti', tokens: { A: 'A', C: 'cchm', D: 'D', E: 'E', G: 'G', P: 'P' }, image: 'agouti-cp.jpg' },
+  { name: 'CP-Agouti-Hell', tokens: { A: 'A', C: 'cchm/ch', D: 'D', E: 'E', G: 'G', P: 'P' } },
   { name: 'CP-Silberagouti', tokens: { A: 'A', C: 'cchm', D: 'D', E: 'E', G: 'g', P: 'P' }, image: 'silberagouti-cp.JPG' },
+  { name: 'CP-Silberagouti-Hell', tokens: { A: 'A', C: 'cchm/ch', D: 'D', E: 'E', G: 'g', P: 'P' } },
   { name: 'CP-Algierfuchs', tokens: { A: 'A', C: 'cchm', D: 'D', E: 'e', G: 'G', P: 'P' }, image: 'algierfuchs-cp.jpg' },
+  { name: 'CP-Algierfuchs-Hell', tokens: { A: 'A', C: 'cchm/ch', D: 'D', E: 'e', G: 'G', P: 'P' } },
   { name: 'CP-Polarfuchs', tokens: { A: 'A', C: 'cchm', D: 'D', E: 'e', G: 'g', P: 'P' }, image: 'polarfuchs-cp.jpg' },
+  { name: 'CP-Polarfuchs-Hell', tokens: { A: 'A', C: 'cchm/ch', D: 'D', E: 'e', G: 'g', P: 'P' } },
   { name: 'CP-Fuchs', tokens: { A: 'A', C: 'cchm', D: 'd', E: 'e', G: 'G', P: 'P' } },
   { name: 'CP-Fuchs-Hell', tokens: { A: 'A', C: 'cchm/ch', D: 'd', E: 'e', G: 'G', P: 'P' } },
   { name: 'CP-Blaufuchs', tokens: { A: 'A', C: 'cchm', D: 'd', E: 'e', G: 'g', P: 'P' } },
   { name: 'CP-Orangeschimmel', tokens: { C: 'cchm', D: 'D', E: 'ef', G: 'G', P: 'P' } },
+  { name: 'CP-Orangeschimmel-Hell', tokens: { C: 'cchm/ch', D: 'D', E: 'ef', G: 'G', P: 'P' } },
 ]
 
 export const UNKNOWN_FARBSCHLAG = 'Unbekannter Farbschlag'
@@ -207,12 +209,14 @@ function baseColourFor(g: Genotype): string | null {
 }
 
 /**
- * GEN-3e: the C-locus colourpoint NAMING transform (breeder-authoritative).
+ * GEN-3e/3g: the C-locus colourpoint NAMING transform (breeder-authoritative).
  * Returns the colourpoint name, or null when it doesn't apply (full C present,
  * or chch — which the base matcher names Hermelin/Himalaya, preserving both).
  *   aa cchm/cchm        -> Marder      | aa cchm/ch        -> Siam
  *   aa cchm/cchm gg     -> Zobel       | aa cchm/ch gg     -> Zobel-Hell
- *   A- cchm/cchm | cchm/ch -> CP-<base colour> (base computed as if C were full)
+ *   A- cchm/cchm        -> CP-<base>   | A- cchm/ch        -> CP-<base>-Hell
+ * GEN-3g (breeder rule): "-Hell" in variety name == c[h]-Allel (cchm/ch het);
+ * no "-Hell" == cchm/cchm hom. CP-Fuchs is a Sammelbegriff (unknown loci).
  */
 function colourpointName(g: Genotype): string | null {
   const c = resolvedPair(g, 'C')
@@ -227,9 +231,9 @@ function colourpointName(g: Genotype): string | null {
     if (grey) return bothCchm ? 'Zobel' : 'Zobel-Hell'
     return bothCchm ? 'Marder' : 'Siam'
   }
-  // A- colourpoint -> CP-<base colour>, base as if C were full.
+  // A- colourpoint: base as if C were full; het (cchm/ch) -> '-Hell' suffix.
   const base = baseColourFor(makeGenotype({ ...g, C: ['C', 'C'] }))
-  return base ? `CP-${base}` : null
+  return base ? `CP-${base}${bothCchm ? '' : '-Hell'}` : null
 }
 
 export function farbschlagFor(g: Genotype): FarbschlagMatch {
diff --git a/gerbil-manager-web/src/genetics/colorVarietySeed.generated.json b/gerbil-manager-web/src/genetics/colorVarietySeed.generated.json
index 386c585..c696cbc 100644
--- a/gerbil-manager-web/src/genetics/colorVarietySeed.generated.json
+++ b/gerbil-manager-web/src/genetics/colorVarietySeed.generated.json
@@ -340,42 +340,67 @@
     "sortOrder": 53,
     "image": "agouti-cp.jpg"
   },
+  {
+    "name": "CP-Agouti-Hell",
+    "canonicalGenotype": "AA cchmch DD EE GG PP spsp rere",
+    "sortOrder": 54
+  },
   {
     "name": "CP-Silberagouti",
     "canonicalGenotype": "AA cchmcchm DD EE gg PP spsp rere",
-    "sortOrder": 54,
+    "sortOrder": 55,
     "image": "silberagouti-cp.JPG"
   },
+  {
+    "name": "CP-Silberagouti-Hell",
+    "canonicalGenotype": "AA cchmch DD EE gg PP spsp rere",
+    "sortOrder": 56
+  },
   {
     "name": "CP-Algierfuchs",
     "canonicalGenotype": "AA cchmcchm DD ee GG PP spsp rere",
-    "sortOrder": 55,
+    "sortOrder": 57,
     "image": "algierfuchs-cp.jpg"
   },
+  {
+    "name": "CP-Algierfuchs-Hell",
+    "canonicalGenotype": "AA cchmch DD ee GG PP spsp rere",
+    "sortOrder": 58
+  },
   {
     "name": "CP-Polarfuchs",
     "canonicalGenotype": "AA cchmcchm DD ee gg PP spsp rere",
-    "sortOrder": 56,
+    "sortOrder": 59,
     "image": "polarfuchs-cp.jpg"
   },
+  {
+    "name": "CP-Polarfuchs-Hell",
+    "canonicalGenotype": "AA cchmch DD ee gg PP spsp rere",
+    "sortOrder": 60
+  },
   {
     "name": "CP-Fuchs",
     "canonicalGenotype": "AA cchmcchm dd ee GG PP spsp rere",
-    "sortOrder": 57
+    "sortOrder": 61
   },
   {
     "name": "CP-Fuchs-Hell",
     "canonicalGenotype": "AA cchmch dd ee GG PP spsp rere",
-    "sortOrder": 58
+    "sortOrder": 62
   },
   {
     "name": "CP-Blaufuchs",
     "canonicalGenotype": "AA cchmcchm dd ee gg PP spsp rere",
-    "sortOrder": 59
+    "sortOrder": 63
   },
   {
     "name": "CP-Orangeschimmel",
     "canonicalGenotype": "AA cchmcchm DD efef GG PP spsp rere",
-    "sortOrder": 60
+    "sortOrder": 64
+  },
+  {
+    "name": "CP-Orangeschimmel-Hell",
+    "canonicalGenotype": "AA cchmch DD efef GG PP spsp rere",
+    "sortOrder": 65
   }
 ]