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   ],
   [
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    146,
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   ],
   [
    3,
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    153,
    174,
    195
   ]
  ]
 },
 "distance": {
  "d": 20,
  "X": {
   "value": 20,
   "confidence": "upper_bound",
   "witness": [
    3,
    7,
    11,
    45,
    47,
    53,
    56,
    75,
    101,
    102,
    111,
    131,
    143,
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    166,
    167,
    175,
    183,
    189,
    193
   ]
  },
  "Z": {
   "value": 20,
   "confidence": "upper_bound",
   "witness": [
    4,
    9,
    12,
    20,
    45,
    52,
    56,
    66,
    74,
    76,
    84,
    89,
    109,
    110,
    123,
    145,
    161,
    164,
    180,
    193
   ]
  }
 },
 "provenance": {
  "authors": [
   "@MathysRennela"
  ],
  "construction": "contributed via qldpc submit",
  "origin": "submission",
  "date": "2026-09-18",
  "model": "DeepSeek V4 Flash 0731",
  "notes": "Literature reproduction of a published 2BGA code (arXiv:2306.16400; github.com/QEC-pages/2BGA-codes @ 403d194c3f98f0cadc236aecbc4a8b6139ccf23c). Checked against the live board: not equivalent to any existing entry."
 },
 "family": "generalized-bicycle"
}