Parity checks
X-checks 328 (max weight 4) · Z-checks 328 (max weight 4)
H_X (328 checks, sparse supports)
[0, 1]
[2, 3]
[4, 5]
[6, 7]
[9, 10]
[11, 12]
[13, 14]
[15, 16]
[18, 19]
[20, 21]
[22, 23]
[24, 25]
[1, 2, 28, 29]
[3, 4, 30, 31]
[5, 6, 32, 33]
[7, 8, 34, 35]
[10, 11, 37, 38]
[12, 13, 39, 40]
[14, 15, 41, 42]
[16, 17, 43, 44]
[19, 20, 46, 47]
[21, 22, 48, 49]
[23, 24, 50, 51]
[25, 26, 52, 53]
[27, 28, 54, 55]
[29, 30, 56, 57]
[31, 32, 58, 59]
[33, 34, 60, 61]
[36, 37, 63, 64]
[38, 39, 65, 66]
[40, 41, 67, 68]
[42, 43, 69, 70]
[45, 46, 72, 73]
[47, 48, 74, 75]
[49, 50, 76, 77]
[51, 52, 78, 79]
[55, 56, 82, 83]
[57, 58, 84, 85]
[59, 60, 86, 87]
[61, 62, 88, 89]
[64, 65, 91, 92]
[66, 67, 93, 94]
[68, 69, 95, 96]
[70, 71, 97, 98]
[73, 74, 100, 101]
[75, 76, 102, 103]
[77, 78, 104, 105]
[79, 80, 106, 107]
[81, 82, 108, 109]
[83, 84, 110, 111]
[85, 86, 112, 113]
[87, 88, 114, 115]
[90, 91, 117, 118]
[92, 93, 119, 120]
[94, 95, 121, 122]
[96, 97, 123, 124]
[99, 100, 126, 127]
[101, 102, 128, 129]
[103, 104, 130, 131]
[105, 106, 132, 133]
[109, 110, 136, 137]
[111, 112, 138, 139]
[113, 114, 140, 141]
[115, 116, 142, 143]
[118, 119, 145, 146]
[120, 121, 147, 148]
[122, 123, 149, 150]
[124, 125, 151, 152]
[127, 128, 154, 155]
[129, 130, 156, 157]
[131, 132, 158, 159]
[133, 134, 160, 161]
[135, 136, 162, 163]
[137, 138, 164, 165]
[139, 140, 166, 167]
[141, 142, 168, 169]
[144, 145, 172, 173]
[146, 147, 174, 175]
[148, 149, 176, 177]
[150, 151, 178, 179]
[153, 154, 182, 183]
[155, 156, 184, 185]
[157, 158, 186, 187]
[159, 160, 188, 189]
[163, 164, 192, 193]
[165, 166, 194, 195]
[167, 168, 196, 197]
[169, 170, 198, 199]
[171, 172, 200, 201]
[173, 174, 202, 203]
[175, 176, 204, 205]
[177, 178, 206, 207]
[179, 180, 208, 209]
[181, 182, 210, 211]
[183, 184, 212, 213]
[185, 186, 214, 215]
[187, 188, 216, 217]
[189, 190, 218, 219]
[191, 192, 220, 221]
[193, 194, 222, 223]
[195, 196, 224, 225]
[197, 198, 226, 227]
[199, 200, 228, 229]
[201, 202, 230, 231]
[203, 204, 232, 233]
[205, 206, 234, 235]
[207, 208, 236, 237]
[209, 210, 238, 239]
[211, 212, 240, 241]
[213, 214, 242, 243]
[215, 216, 244, 245]
[217, 218, 246, 247]
[221, 222]
[223, 224]
[225, 226, 249, 250]
[227, 228, 251, 252]
[229, 230, 253, 254]
[231, 232, 255, 256]
[233, 234, 257]
[235, 236, 258, 259]
[237, 238, 260, 261]
[239, 240, 262, 263]
[241, 242, 264, 265]
[243, 244, 266]
[245, 246]
[247, 248]
[249, 267]
[250, 251, 268, 269]
[252, 253, 270, 271]
[254, 255, 272, 273]
[256, 257, 274, 275]
[258, 276]
[259, 260, 277, 278]
[261, 262, 279, 280]
[263, 264, 281, 282]
[265, 266, 283, 284]
[267, 268, 285, 286]
[269, 270, 287, 288]
[271, 272, 289, 290]
[273, 274, 291, 292]
[275, 293]
[276, 277, 294, 295]
[278, 279, 296, 297]
[280, 281, 298, 299]
[282, 283, 300, 301]
[284, 302]
[303, 304]
[305, 306]
[285, 307, 308]
[286, 287, 309, 310]
[288, 289, 311, 312]
[290, 291, 313, 314]
[292, 293, 315, 316]
[294, 317, 318]
[295, 296, 319, 320]
[297, 298, 321, 322]
[299, 300, 323, 324]
[301, 302, 325, 326]
[327, 328]
[329, 330]
[304, 305, 333, 334]
[306, 307, 335, 336]
[308, 309, 337, 338]
[310, 311, 339, 340]
[312, 313, 341, 342]
[314, 315, 343, 344]
[316, 317, 345, 346]
[318, 319, 347, 348]
[320, 321, 349, 350]
[322, 323, 351, 352]
[324, 325, 353, 354]
[326, 327, 355, 356]
[328, 329, 357, 358]
[330, 331, 359, 360]
[332, 333, 361, 362]
[334, 335, 363, 364]
[336, 337, 365, 366]
[338, 339, 367, 368]
[340, 341, 369, 370]
[342, 343, 371, 372]
[344, 345, 373, 374]
[346, 347, 375, 376]
[348, 349, 377, 378]
[350, 351, 379, 380]
[352, 353, 381, 382]
[354, 355, 383, 384]
[356, 357, 385, 386]
[358, 359, 387, 388]
[362, 363, 391, 392]
[364, 365, 393, 394]
[366, 367, 395, 396]
[368, 369, 397, 398]
[372, 373, 400, 401]
[374, 375, 402, 403]
[376, 377, 404, 405]
[378, 379, 406, 407]
[382, 383, 409, 410]
[384, 385, 411, 412]
[386, 387, 413, 414]
[388, 389, 415, 416]
[390, 391, 417, 418]
[392, 393, 419, 420]
[394, 395, 421, 422]
[396, 397, 423, 424]
[399, 400, 426, 427]
[401, 402, 428, 429]
[403, 404, 430, 431]
[405, 406, 432, 433]
[408, 409, 435, 436]
[410, 411, 437, 438]
[412, 413, 439, 440]
[414, 415, 441, 442]
[418, 419, 445, 446]
[420, 421, 447, 448]
[422, 423, 449, 450]
[424, 425, 451, 452]
[427, 428, 454, 455]
[429, 430, 456, 457]
[431, 432, 458, 459]
[433, 434, 460, 461]
[436, 437, 463, 464]
[438, 439, 465, 466]
[440, 441, 467, 468]
[442, 443, 469, 470]
[444, 445, 471, 472]
[446, 447, 473, 474]
[448, 449, 475, 476]
[450, 451, 477, 478]
[453, 454, 481, 482]
[455, 456, 483, 484]
[457, 458, 485, 486]
[459, 460, 487, 488]
[462, 463, 491, 492]
[464, 465, 493, 494]
[466, 467, 495, 496]
[468, 469, 497, 498]
[472, 473, 501, 502]
[474, 475, 503, 504]
[476, 477, 505, 506]
[478, 479, 507, 508]
[480, 481, 509, 510]
[482, 483, 511, 512]
[484, 485, 513, 514]
[486, 487, 515, 516]
[488, 489, 517, 518]
[490, 491, 519, 520]
[492, 493, 521, 522]
[494, 495, 523, 524]
[496, 497, 525, 526]
[498, 499, 527, 528]
[500, 501, 529, 530]
[502, 503, 531, 532]
[504, 505, 533, 534]
[506, 507, 535, 536]
[508, 509, 537, 538]
[510, 511, 539, 540]
[512, 513, 541, 542]
[514, 515, 543, 544]
[516, 517, 545, 546]
[518, 519, 547, 548]
[520, 521, 549, 550]
[522, 523, 551, 552]
[524, 525, 553, 554]
[526, 527, 555, 556]
[530, 531]
[532, 533]
[534, 535, 558, 559]
[536, 537, 560, 561]
[538, 539, 562, 563]
[540, 541, 564, 565]
[542, 543, 566]
[544, 545, 567, 568]
[546, 547, 569, 570]
[548, 549, 571, 572]
[550, 551, 573, 574]
[552, 553, 575]
[554, 555]
[556, 557]
[558, 576]
[559, 560, 577, 578]
[561, 562, 579, 580]
[563, 564, 581, 582]
[565, 566, 583, 584]
[567, 585]
[568, 569, 586, 587]
[570, 571, 588, 589]
[572, 573, 590, 591]
[574, 575, 592, 593]
[576, 577, 594, 595]
[578, 579, 596, 597]
[580, 581, 598, 599]
[582, 583, 600, 601]
[584, 602]
[585, 586, 603, 604]
[587, 588, 605, 606]
[589, 590, 607, 608]
[591, 592, 609, 610]
[593, 611]
[594, 612]
[595, 596, 613, 614]
[597, 598, 615, 616]
[599, 600, 617, 618]
[601, 602, 619, 620]
[603, 621]
[604, 605, 622, 623]
[606, 607, 624, 625]
[608, 609, 626, 627]
[610, 611, 628, 629]
[612, 613, 630, 631]
[614, 615, 632, 633]
[616, 617, 634, 635]
[618, 619, 636, 637]
[620, 638]
[621, 622, 639, 640]
[623, 624, 641, 642]
[625, 626, 643, 644]
[627, 628, 645, 646]
[629, 647]
[630, 648]
[631, 632, 649, 650]
[633, 634, 651, 652]
[635, 636, 653, 654]
[637, 638, 655, 656]
[639, 657]
[640, 641, 658, 659]
[642, 643, 660, 661]
[644, 645, 662, 663]
[646, 647, 664, 665]
H_Z (328 checks, sparse supports)
[0, 1, 27, 28]
[2, 3, 29, 30]
[4, 5, 31, 32]
[6, 7, 33, 34]
[8, 35]
[9, 10, 36, 37]
[11, 12, 38, 39]
[13, 14, 40, 41]
[15, 16, 42, 43]
[17, 44]
[18, 19, 45, 46]
[20, 21, 47, 48]
[22, 23, 49, 50]
[24, 25, 51, 52]
[26, 53]
[27, 54]
[28, 29, 55, 56]
[30, 31, 57, 58]
[32, 33, 59, 60]
[34, 35, 61, 62]
[36, 63]
[37, 38, 64, 65]
[39, 40, 66, 67]
[41, 42, 68, 69]
[43, 44, 70, 71]
[45, 72]
[46, 47, 73, 74]
[48, 49, 75, 76]
[50, 51, 77, 78]
[52, 53, 79, 80]
[54, 55, 81, 82]
[56, 57, 83, 84]
[58, 59, 85, 86]
[60, 61, 87, 88]
[62, 89]
[63, 64, 90, 91]
[65, 66, 92, 93]
[67, 68, 94, 95]
[69, 70, 96, 97]
[71, 98]
[72, 73, 99, 100]
[74, 75, 101, 102]
[76, 77, 103, 104]
[78, 79, 105, 106]
[80, 107]
[81, 108]
[82, 83, 109, 110]
[84, 85, 111, 112]
[86, 87, 113, 114]
[88, 89, 115, 116]
[90, 117]
[91, 92, 118, 119]
[93, 94, 120, 121]
[95, 96, 122, 123]
[97, 98, 124, 125]
[99, 126]
[100, 101, 127, 128]
[102, 103, 129, 130]
[104, 105, 131, 132]
[106, 107, 133, 134]
[108, 109, 135, 136]
[110, 111, 137, 138]
[112, 113, 139, 140]
[114, 115, 141, 142]
[116, 143]
[117, 118, 144, 145]
[119, 120, 146, 147]
[121, 122, 148, 149]
[123, 124, 150, 151]
[125, 152]
[126, 127, 153, 154]
[128, 129, 155, 156]
[130, 131, 157, 158]
[132, 133, 159, 160]
[134, 161]
[135, 162]
[136, 137, 163, 164]
[138, 139, 165, 166]
[140, 141, 167, 168]
[142, 143, 169, 170]
[144, 171, 172]
[145, 146, 173, 174]
[147, 148, 175, 176]
[149, 150, 177, 178]
[151, 152, 179, 180]
[153, 181, 182]
[154, 155, 183, 184]
[156, 157, 185, 186]
[158, 159, 187, 188]
[160, 161, 189, 190]
[162, 163, 191, 192]
[164, 165, 193, 194]
[166, 167, 195, 196]
[168, 169, 197, 198]
[170, 171, 199, 200]
[172, 173, 201, 202]
[174, 175, 203, 204]
[176, 177, 205, 206]
[178, 179, 207, 208]
[180, 181, 209, 210]
[182, 183, 211, 212]
[184, 185, 213, 214]
[186, 187, 215, 216]
[188, 189, 217, 218]
[190, 219]
[191, 220]
[192, 193, 221, 222]
[194, 195, 223, 224]
[196, 197, 225, 226]
[198, 199, 227, 228]
[200, 201, 229, 230]
[202, 203, 231, 232]
[204, 205, 233, 234]
[206, 207, 235, 236]
[208, 209, 237, 238]
[210, 211, 239, 240]
[212, 213, 241, 242]
[214, 215, 243, 244]
[216, 217, 245, 246]
[218, 219, 247, 248]
[226, 227, 250, 251]
[228, 229, 252, 253]
[230, 231, 254, 255]
[232, 233, 256, 257]
[236, 237, 259, 260]
[238, 239, 261, 262]
[240, 241, 263, 264]
[242, 243, 265, 266]
[249, 250, 267, 268]
[251, 252, 269, 270]
[253, 254, 271, 272]
[255, 256, 273, 274]
[258, 259, 276, 277]
[260, 261, 278, 279]
[262, 263, 280, 281]
[264, 265, 282, 283]
[268, 269, 286, 287]
[270, 271, 288, 289]
[272, 273, 290, 291]
[274, 275, 292, 293]
[277, 278, 295, 296]
[279, 280, 297, 298]
[281, 282, 299, 300]
[283, 284, 301, 302]
[285, 286, 308, 309]
[287, 288, 310, 311]
[289, 290, 312, 313]
[291, 292, 314, 315]
[294, 295, 318, 319]
[296, 297, 320, 321]
[298, 299, 322, 323]
[300, 301, 324, 325]
[303, 304, 332, 333]
[305, 306, 334, 335]
[307, 308, 336, 337]
[309, 310, 338, 339]
[311, 312, 340, 341]
[313, 314, 342, 343]
[315, 316, 344, 345]
[317, 318, 346, 347]
[319, 320, 348, 349]
[321, 322, 350, 351]
[323, 324, 352, 353]
[325, 326, 354, 355]
[327, 328, 356, 357]
[329, 330, 358, 359]
[331, 360]
[332, 361]
[333, 334, 362, 363]
[335, 336, 364, 365]
[337, 338, 366, 367]
[339, 340, 368, 369]
[341, 342, 370, 371]
[343, 344, 372, 373]
[345, 346, 374, 375]
[347, 348, 376, 377]
[349, 350, 378, 379]
[351, 352, 380, 381]
[353, 354, 382, 383]
[355, 356, 384, 385]
[357, 358, 386, 387]
[359, 360, 388, 389]
[361, 362, 390, 391]
[363, 364, 392, 393]
[365, 366, 394, 395]
[367, 368, 396, 397]
[369, 370, 398]
[371, 372, 399, 400]
[373, 374, 401, 402]
[375, 376, 403, 404]
[377, 378, 405, 406]
[379, 380, 407]
[381, 382, 408, 409]
[383, 384, 410, 411]
[385, 386, 412, 413]
[387, 388, 414, 415]
[389, 416]
[390, 417]
[391, 392, 418, 419]
[393, 394, 420, 421]
[395, 396, 422, 423]
[397, 398, 424, 425]
[399, 426]
[400, 401, 427, 428]
[402, 403, 429, 430]
[404, 405, 431, 432]
[406, 407, 433, 434]
[408, 435]
[409, 410, 436, 437]
[411, 412, 438, 439]
[413, 414, 440, 441]
[415, 416, 442, 443]
[417, 418, 444, 445]
[419, 420, 446, 447]
[421, 422, 448, 449]
[423, 424, 450, 451]
[425, 452]
[426, 427, 453, 454]
[428, 429, 455, 456]
[430, 431, 457, 458]
[432, 433, 459, 460]
[434, 461]
[435, 436, 462, 463]
[437, 438, 464, 465]
[439, 440, 466, 467]
[441, 442, 468, 469]
[443, 470]
[444, 471]
[445, 446, 472, 473]
[447, 448, 474, 475]
[449, 450, 476, 477]
[451, 452, 478, 479]
[453, 480, 481]
[454, 455, 482, 483]
[456, 457, 484, 485]
[458, 459, 486, 487]
[460, 461, 488, 489]
[462, 490, 491]
[463, 464, 492, 493]
[465, 466, 494, 495]
[467, 468, 496, 497]
[469, 470, 498, 499]
[471, 472, 500, 501]
[473, 474, 502, 503]
[475, 476, 504, 505]
[477, 478, 506, 507]
[479, 480, 508, 509]
[481, 482, 510, 511]
[483, 484, 512, 513]
[485, 486, 514, 515]
[487, 488, 516, 517]
[489, 490, 518, 519]
[491, 492, 520, 521]
[493, 494, 522, 523]
[495, 496, 524, 525]
[497, 498, 526, 527]
[499, 528]
[500, 529]
[501, 502, 530, 531]
[503, 504, 532, 533]
[505, 506, 534, 535]
[507, 508, 536, 537]
[509, 510, 538, 539]
[511, 512, 540, 541]
[513, 514, 542, 543]
[515, 516, 544, 545]
[517, 518, 546, 547]
[519, 520, 548, 549]
[521, 522, 550, 551]
[523, 524, 552, 553]
[525, 526, 554, 555]
[527, 528, 556, 557]
[535, 536, 559, 560]
[537, 538, 561, 562]
[539, 540, 563, 564]
[541, 542, 565, 566]
[545, 546, 568, 569]
[547, 548, 570, 571]
[549, 550, 572, 573]
[551, 552, 574, 575]
[558, 559, 576, 577]
[560, 561, 578, 579]
[562, 563, 580, 581]
[564, 565, 582, 583]
[567, 568, 585, 586]
[569, 570, 587, 588]
[571, 572, 589, 590]
[573, 574, 591, 592]
[577, 578, 595, 596]
[579, 580, 597, 598]
[581, 582, 599, 600]
[583, 584, 601, 602]
[586, 587, 604, 605]
[588, 589, 606, 607]
[590, 591, 608, 609]
[592, 593, 610, 611]
[594, 595, 612, 613]
[596, 597, 614, 615]
[598, 599, 616, 617]
[600, 601, 618, 619]
[603, 604, 621, 622]
[605, 606, 623, 624]
[607, 608, 625, 626]
[609, 610, 627, 628]
[613, 614, 631, 632]
[615, 616, 633, 634]
[617, 618, 635, 636]
[619, 620, 637, 638]
[622, 623, 640, 641]
[624, 625, 642, 643]
[626, 627, 644, 645]
[628, 629, 646, 647]
[630, 631, 648, 649]
[632, 633, 650, 651]
[634, 635, 652, 653]
[636, 637, 654, 655]
[639, 640, 657, 658]
[641, 642, 659, 660]
[643, 644, 661, 662]
[645, 646, 663, 664]
[649, 650]
[651, 652]
[653, 654]
[655, 656]
[658, 659]
[660, 661]
[662, 663]
[664, 665]