{
 "schema_version": "0.1",
 "name": "[[21,2,6]]",
 "code_type": "CSS",
 "n": 21,
 "k": 2,
 "checks": {
  "X": [
   [
    0,
    3,
    4,
    9,
    11
   ],
   [
    2,
    3,
    8,
    10,
    20
   ],
   [
    1,
    2,
    7,
    9,
    19
   ],
   [
    0,
    1,
    6,
    8,
    18
   ],
   [
    0,
    5,
    7,
    17,
    20
   ],
   [
    4,
    6,
    16,
    19,
    20
   ],
   [
    3,
    5,
    15,
    18,
    19
   ],
   [
    2,
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    14,
    17,
    18
   ],
   [
    1,
    3,
    13,
    16,
    17
   ],
   [
    0,
    2,
    12,
    15,
    16
   ]
  ],
  "Z": [
   [
    0,
    1,
    3,
    5,
    9,
    10,
    11,
    12
   ],
   [
    0,
    2,
    4,
    8,
    9,
    10,
    11,
    20
   ],
   [
    1,
    3,
    7,
    8,
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    10,
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   ],
   [
    0,
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    8,
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    18,
    19
   ],
   [
    1,
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    6,
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    17,
    18,
    20
   ],
   [
    0,
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    5,
    6,
    7,
    16,
    17,
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   ],
   [
    3,
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    5,
    6,
    15,
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    18,
    20
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   [
    2,
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    15,
    17,
    19
   ],
   [
    1,
    2,
    3,
    4,
    13,
    14,
    16,
    18
   ]
  ]
 },
 "distance": {
  "d": 6,
  "X": {
   "value": 6,
   "confidence": "upper_bound",
   "witness": [
    2,
    7,
    13,
    14,
    16,
    20
   ]
  },
  "Z": {
   "value": 6,
   "confidence": "upper_bound",
   "witness": [
    0,
    1,
    5,
    9,
    13,
    15
   ]
  }
 },
 "provenance": {
  "authors": [
   "@mathysrennela"
  ],
  "construction": "Reconstructed from qecdb.org record 670522be19cca60cf657a912 (https://qecdb.org/codes/670522be19cca60cf657a912); the record's H field is read as binary symplectic rows and split by rowspace (rank(A|B) = rank(A) + rank(B)), keeping the lightest independent basis of each part; n, k and the check weight recomputed here, witnesses from the kit's random search at the trials below. Database description: none; database distance claim d=6 (lower 6, upper 6).",
  "origin": "submission",
  "date": "2026-09-27",
  "model": "Mimo-V2.6-Free",
  "notes": "Equivalence assessed against the board: no exact stabilizer-group fingerprint match and no Weisfeiler-Leman signature match to any existing entry."
 },
 "family": "other"
}