{
 "schema_version": "0.2",
 "name": "[[60,4,9]]",
 "code_type": "CSS",
 "n": 60,
 "k": 4,
 "checks": {
  "X": [
   [
    0,
    28,
    30,
    36,
    51,
    59
   ],
   [
    1,
    29,
    31,
    39,
    48,
    58
   ],
   [
    2,
    20,
    30,
    32,
    41,
    53
   ],
   [
    3,
    6,
    33,
    39,
    42,
    56
   ],
   [
    4,
    23,
    31,
    34,
    38,
    50
   ],
   [
    5,
    9,
    35,
    36,
    45,
    54
   ],
   [
    6,
    25,
    32,
    36,
    46,
    57
   ],
   [
    0,
    7,
    31,
    33,
    37,
    47
   ],
   [
    8,
    12,
    38,
    45,
    48,
    59
   ],
   [
    9,
    27,
    34,
    39,
    43,
    55
   ],
   [
    1,
    10,
    30,
    35,
    40,
    44
   ],
   [
    11,
    15,
    41,
    42,
    51,
    58
   ],
   [
    2,
    12,
    34,
    37,
    42,
    52
   ],
   [
    3,
    13,
    35,
    38,
    43,
    53
   ],
   [
    14,
    18,
    39,
    44,
    51,
    54
   ],
   [
    4,
    15,
    32,
    40,
    45,
    49
   ],
   [
    5,
    16,
    33,
    41,
    46,
    50
   ],
   [
    17,
    21,
    36,
    47,
    48,
    56
   ],
   [
    7,
    18,
    40,
    43,
    48,
    57
   ],
   [
    8,
    19,
    31,
    41,
    44,
    49
   ],
   [
    20,
    24,
    45,
    50,
    56,
    58
   ],
   [
    10,
    21,
    37,
    46,
    51,
    55
   ],
   [
    11,
    22,
    30,
    38,
    47,
    52
   ],
   [
    23,
    26,
    42,
    53,
    54,
    59
   ],
   [
    13,
    24,
    34,
    46,
    49,
    54
   ],
   [
    14,
    25,
    35,
    47,
    50,
    55
   ],
   [
    16,
    26,
    32,
    43,
    52,
    56
   ],
   [
    17,
    27,
    33,
    44,
    53,
    57
   ],
   [
    19,
    28,
    40,
    52,
    55,
    58
   ],
   [
    22,
    29,
    37,
    49,
    57,
    59
   ]
  ],
  "Z": [
   [
    0,
    2,
    10,
    22,
    30,
    37
   ],
   [
    1,
    4,
    7,
    19,
    31,
    40
   ],
   [
    2,
    6,
    15,
    26,
    32,
    42
   ],
   [
    3,
    7,
    16,
    27,
    33,
    43
   ],
   [
    4,
    9,
    12,
    24,
    34,
    45
   ],
   [
    5,
    10,
    13,
    25,
    35,
    46
   ],
   [
    0,
    5,
    6,
    17,
    33,
    36
   ],
   [
    7,
    12,
    21,
    29,
    37,
    48
   ],
   [
    4,
    8,
    13,
    22,
    38,
    49
   ],
   [
    1,
    3,
    9,
    14,
    35,
    39
   ],
   [
    10,
    15,
    18,
    28,
    40,
    51
   ],
   [
    2,
    11,
    16,
    19,
    41,
    52
   ],
   [
    3,
    11,
    12,
    23,
    38,
    42
   ],
   [
    9,
    13,
    18,
    26,
    43,
    54
   ],
   [
    10,
    14,
    19,
    27,
    44,
    55
   ],
   [
    5,
    8,
    15,
    20,
    41,
    45
   ],
   [
    6,
    16,
    21,
    24,
    46,
    56
   ],
   [
    7,
    17,
    22,
    25,
    47,
    57
   ],
   [
    1,
    8,
    17,
    18,
    44,
    48
   ],
   [
    15,
    19,
    24,
    29,
    49,
    58
   ],
   [
    4,
    16,
    20,
    25,
    32,
    50
   ],
   [
    0,
    11,
    14,
    21,
    47,
    51
   ],
   [
    12,
    22,
    26,
    28,
    52,
    59
   ],
   [
    2,
    13,
    23,
    27,
    34,
    53
   ],
   [
    5,
    14,
    23,
    24,
    50,
    54
   ],
   [
    9,
    21,
    25,
    28,
    36,
    55
   ],
   [
    3,
    17,
    20,
    26,
    53,
    56
   ],
   [
    6,
    18,
    27,
    29,
    39,
    57
   ],
   [
    1,
    11,
    20,
    28,
    30,
    58
   ],
   [
    0,
    8,
    23,
    29,
    31,
    59
   ]
  ]
 },
 "distance": {
  "d": 9,
  "X": {
   "value": 9,
   "confidence": "upper_bound",
   "witness": [
    11,
    12,
    29,
    41,
    45,
    47,
    57,
    58,
    59
   ]
  },
  "Z": {
   "value": 9,
   "confidence": "upper_bound",
   "witness": [
    2,
    5,
    12,
    23,
    25,
    26,
    32,
    45,
    50
   ]
  }
 },
 "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",
 "locality": {
  "coordinates": [
   [
    1,
    8
   ],
   [
    4,
    0
   ],
   [
    3,
    5
   ],
   [
    1,
    1
   ],
   [
    5,
    6
   ],
   [
    5,
    7
   ],
   [
    3,
    4
   ],
   [
    4,
    5
   ],
   [
    0,
    3
   ],
   [
    2,
    4
   ],
   [
    3,
    2
   ],
   [
    5,
    5
   ],
   [
    0,
    7
   ],
   [
    1,
    6
   ],
   [
    2,
    3
   ],
   [
    6,
    1
   ],
   [
    5,
    4
   ],
   [
    2,
    5
   ],
   [
    3,
    0
   ],
   [
    5,
    1
   ],
   [
    6,
    2
   ],
   [
    3,
    8
   ],
   [
    1,
    7
   ],
   [
    1,
    5
   ],
   [
    6,
    6
   ],
   [
    6,
    7
   ],
   [
    2,
    1
   ],
   [
    0,
    0
   ],
   [
    5,
    3
   ],
   [
    1,
    3
   ],
   [
    2,
    2
   ],
   [
    0,
    4
   ],
   [
    6,
    3
   ],
   [
    2,
    6
   ],
   [
    0,
    5
   ],
   [
    4,
    2
   ],
   [
    4,
    8
   ],
   [
    2,
    8
   ],
   [
    0,
    6
   ],
   [
    0,
    1
   ],
   [
    5,
    0
   ],
   [
    6,
    4
   ],
   [
    0,
    2
   ],
   [
    1,
    0
   ],
   [
    2,
    0
   ],
   [
    6,
    5
   ],
   [
    5,
    8
   ],
   [
    2,
    7
   ],
   [
    4,
    4
   ],
   [
    4,
    6
   ],
   [
    4,
    7
   ],
   [
    1,
    4
   ],
   [
    1,
    2
   ],
   [
    3,
    1
   ],
   [
    5,
    2
   ],
   [
    4,
    3
   ],
   [
    3,
    6
   ],
   [
    3,
    3
   ],
   [
    4,
    1
   ],
   [
    3,
    7
   ]
  ],
  "layers": 1,
  "contributed_by": {
   "by": [
    "@mathysrennela"
   ],
   "date": "2026-09-19",
   "method": "simulated annealing over integer grid sites (research/local2d/fold_layout.py)"
  }
 }
}