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 "provenance": {
  "authors": [
   "@mathysrennela"
  ],
  "construction": "2BGA on nonabelian group C8:Q8 (order 64). Weight-4 supports a=[2,6,17,23], b=[6,16,37,59] give row weight 8. Odd k=13 unreachable by abelian BB. Found by systematic 2BGA sweep over nonabelian groups of order 60-200, filtering for odd k, screened at 400 RIS trials. Second-best efficiency kd\u00b2/n=10.156.",
  "references": [],
  "date": "2026-07-30",
  "model": "Xiaomi Mimo-V2.5",
  "notes": ""
 },
 "family": "generalized-bicycle"
}