Parity checks
X-checks 414 (max weight 4) · Z-checks 414 (max weight 4)
H_X (414 checks, sparse supports)
[0, 1]
[2, 3]
[4, 5]
[7, 8]
[9, 10]
[11, 12]
[14, 15]
[16, 17]
[18, 19]
[21, 22]
[23, 24]
[25, 26]
[1, 2, 29, 30]
[3, 4, 31, 32]
[5, 6, 33, 34]
[8, 9, 36, 37]
[10, 11, 38, 39]
[12, 13, 40, 41]
[15, 16, 43, 44]
[17, 18, 45, 46]
[19, 20, 47, 48]
[22, 23, 50, 51]
[24, 25, 52, 53]
[26, 27, 54, 55]
[28, 29, 56, 57]
[30, 31, 58, 59]
[32, 33, 60, 61]
[35, 36, 63, 64]
[37, 38, 65, 66]
[39, 40, 67, 68]
[42, 43, 70, 71]
[44, 45, 72, 73]
[46, 47, 74, 75]
[49, 50, 77, 78]
[51, 52, 79, 80]
[53, 54, 81, 82]
[57, 58, 85, 86]
[59, 60, 87, 88]
[61, 62, 89, 90]
[64, 65, 92, 93]
[66, 67, 94, 95]
[68, 69, 96, 97]
[71, 72, 99, 100]
[73, 74, 101, 102]
[75, 76, 103, 104]
[78, 79, 106, 107]
[80, 81, 108, 109]
[82, 83, 110, 111]
[84, 85, 112, 113]
[86, 87, 114, 115]
[88, 89, 116, 117]
[91, 92, 119, 120]
[93, 94, 121, 122]
[95, 96, 123, 124]
[98, 99, 126, 127]
[100, 101, 128, 129]
[102, 103, 130, 131]
[105, 106, 133, 134]
[107, 108, 135, 136]
[109, 110, 137, 138]
[113, 114, 141, 142]
[115, 116, 143, 144]
[117, 118, 145, 146]
[120, 121, 149, 150]
[122, 123, 151, 152]
[124, 125, 153, 154]
[127, 128, 157, 158]
[129, 130, 159, 160]
[131, 132, 161, 162]
[134, 135, 165, 166]
[136, 137, 167, 168]
[138, 139, 169, 170]
[140, 141, 171, 172]
[142, 143, 173, 174]
[144, 145, 175, 176]
[146, 147, 177, 178]
[148, 149, 179, 180]
[150, 151, 181, 182]
[152, 153, 183, 184]
[154, 155, 185, 186]
[156, 157, 187, 188]
[158, 159, 189, 190]
[160, 161, 191, 192]
[162, 163, 193, 194]
[164, 165, 195, 196]
[166, 167, 197, 198]
[168, 169, 199, 200]
[172, 173]
[174, 175, 202]
[176, 177, 203, 204]
[178, 179, 205, 206]
[180, 181, 207, 208]
[182, 183, 209]
[184, 185, 210, 211]
[186, 187, 212, 213]
[188, 189, 214, 215]
[190, 191, 216]
[192, 193, 217, 218]
[194, 195, 219, 220]
[196, 197, 221, 222]
[198, 199]
[200, 201]
[202, 203, 223, 224]
[204, 205, 225, 226]
[206, 207, 227, 228]
[208, 229]
[209, 210, 230, 231]
[211, 212, 232, 233]
[213, 214, 234, 235]
[215, 236]
[216, 217, 237, 238]
[218, 219, 239, 240]
[220, 221, 241, 242]
[222, 243]
[223, 244]
[224, 225, 245, 246]
[226, 227, 247, 248]
[228, 229, 249, 250]
[230, 251]
[231, 232, 252, 253]
[233, 234, 254, 255]
[235, 236, 256, 257]
[237, 258]
[238, 239, 259, 260]
[240, 241, 261, 262]
[242, 243, 263, 264]
[265, 266]
[267, 268]
[244, 245, 269, 270]
[246, 247, 271, 272]
[248, 249, 273, 274]
[250, 275, 276]
[251, 252, 277, 278]
[253, 254, 279, 280]
[255, 256, 281, 282]
[257, 283, 284]
[258, 259, 285, 286]
[260, 261, 287, 288]
[262, 263, 289, 290]
[264, 291, 292]
[293, 294]
[266, 267, 297, 298]
[268, 269, 299, 300]
[270, 271, 301, 302]
[272, 273, 303, 304]
[274, 275, 305, 306]
[276, 277, 307, 308]
[278, 279, 309, 310]
[280, 281, 311, 312]
[282, 283, 313, 314]
[284, 285, 315, 316]
[286, 287, 317, 318]
[288, 289, 319, 320]
[290, 291, 321, 322]
[292, 293, 323, 324]
[294, 295, 325, 326]
[296, 297, 327, 328]
[298, 299, 329, 330]
[300, 301, 331, 332]
[304, 305, 334, 335]
[306, 307, 336, 337]
[308, 309, 338, 339]
[312, 313, 341, 342]
[314, 315, 343, 344]
[316, 317, 345, 346]
[320, 321, 348, 349]
[322, 323, 350, 351]
[324, 325, 352, 353]
[328, 329, 356, 357]
[330, 331, 358, 359]
[332, 333, 360, 361]
[335, 336, 363, 364]
[337, 338, 365, 366]
[339, 340, 367, 368]
[342, 343, 370, 371]
[344, 345, 372, 373]
[346, 347, 374, 375]
[349, 350, 377, 378]
[351, 352, 379, 380]
[353, 354, 381, 382]
[355, 356, 383, 384]
[357, 358, 385, 386]
[359, 360, 387, 388]
[362, 363, 390, 391]
[364, 365, 392, 393]
[366, 367, 394, 395]
[369, 370, 397, 398]
[371, 372, 399, 400]
[373, 374, 401, 402]
[376, 377, 404, 405]
[378, 379, 406, 407]
[380, 381, 408, 409]
[384, 385, 412, 413]
[386, 387, 414, 415]
[388, 389, 416, 417]
[391, 392, 420, 421]
[393, 394, 422, 423]
[395, 396, 424, 425]
[398, 399, 428, 429]
[400, 401, 430, 431]
[402, 403, 432, 433]
[405, 406, 436, 437]
[407, 408, 438, 439]
[409, 410, 440, 441]
[411, 412, 442, 443]
[413, 414, 444, 445]
[415, 416, 446, 447]
[417, 418, 448, 449]
[419, 420, 450, 451]
[421, 422, 452, 453]
[423, 424, 454, 455]
[425, 426, 456, 457]
[427, 428, 458, 459]
[429, 430, 460, 461]
[431, 432, 462, 463]
[433, 434, 464, 465]
[435, 436, 466, 467]
[437, 438, 468, 469]
[439, 440, 470, 471]
[443, 444]
[445, 446, 473]
[447, 448, 474, 475]
[449, 450, 476, 477]
[451, 452, 478, 479]
[453, 454, 480]
[455, 456, 481, 482]
[457, 458, 483, 484]
[459, 460, 485, 486]
[461, 462, 487]
[463, 464, 488, 489]
[465, 466, 490, 491]
[467, 468, 492, 493]
[469, 470]
[471, 472]
[473, 474, 494, 495]
[475, 476, 496, 497]
[477, 478, 498, 499]
[479, 500]
[480, 481, 501, 502]
[482, 483, 503, 504]
[484, 485, 505, 506]
[486, 507]
[487, 488, 508, 509]
[489, 490, 510, 511]
[491, 492, 512, 513]
[493, 514]
[494, 515]
[495, 496, 516, 517]
[497, 498, 518, 519]
[499, 500, 520, 521]
[501, 522]
[502, 503, 523, 524]
[504, 505, 525, 526]
[506, 507, 527, 528]
[508, 529]
[509, 510, 530, 531]
[511, 512, 532, 533]
[513, 514, 534, 535]
[536, 537]
[538, 539]
[515, 516, 540, 541]
[517, 518, 542, 543]
[519, 520, 544, 545]
[521, 546, 547]
[522, 523, 548, 549]
[524, 525, 550, 551]
[526, 527, 552, 553]
[528, 554, 555]
[529, 530, 556, 557]
[531, 532, 558, 559]
[533, 534, 560, 561]
[535, 562, 563]
[564, 565]
[537, 538, 568, 569]
[539, 540, 570, 571]
[541, 542, 572, 573]
[543, 544, 574, 575]
[545, 546, 576, 577]
[547, 548, 578, 579]
[549, 550, 580, 581]
[551, 552, 582, 583]
[553, 554, 584, 585]
[555, 556, 586, 587]
[557, 558, 588, 589]
[559, 560, 590, 591]
[561, 562, 592, 593]
[563, 564, 594, 595]
[565, 566, 596, 597]
[567, 568, 598, 599]
[569, 570, 600, 601]
[571, 572, 602, 603]
[575, 576, 605, 606]
[577, 578, 607, 608]
[579, 580, 609, 610]
[583, 584, 612, 613]
[585, 586, 614, 615]
[587, 588, 616, 617]
[591, 592, 619, 620]
[593, 594, 621, 622]
[595, 596, 623, 624]
[599, 600, 627, 628]
[601, 602, 629, 630]
[603, 604, 631, 632]
[606, 607, 634, 635]
[608, 609, 636, 637]
[610, 611, 638, 639]
[613, 614, 641, 642]
[615, 616, 643, 644]
[617, 618, 645, 646]
[620, 621, 648, 649]
[622, 623, 650, 651]
[624, 625, 652, 653]
[626, 627, 654, 655]
[628, 629, 656, 657]
[630, 631, 658, 659]
[633, 634, 661, 662]
[635, 636, 663, 664]
[637, 638, 665, 666]
[640, 641, 668, 669]
[642, 643, 670, 671]
[644, 645, 672, 673]
[647, 648, 675, 676]
[649, 650, 677, 678]
[651, 652, 679, 680]
[655, 656, 683, 684]
[657, 658, 685, 686]
[659, 660, 687, 688]
[662, 663, 691, 692]
[664, 665, 693, 694]
[666, 667, 695, 696]
[669, 670, 699, 700]
[671, 672, 701, 702]
[673, 674, 703, 704]
[676, 677, 707, 708]
[678, 679, 709, 710]
[680, 681, 711, 712]
[682, 683, 713, 714]
[684, 685, 715, 716]
[686, 687, 717, 718]
[688, 689, 719, 720]
[690, 691, 721, 722]
[692, 693, 723, 724]
[694, 695, 725, 726]
[696, 697, 727, 728]
[698, 699, 729, 730]
[700, 701, 731, 732]
[702, 703, 733, 734]
[704, 705, 735, 736]
[706, 707, 737, 738]
[708, 709, 739, 740]
[710, 711, 741, 742]
[714, 715]
[716, 717, 744]
[718, 719, 745, 746]
[720, 721, 747, 748]
[722, 723, 749, 750]
[724, 725, 751]
[726, 727, 752, 753]
[728, 729, 754, 755]
[730, 731, 756, 757]
[732, 733, 758]
[734, 735, 759, 760]
[736, 737, 761, 762]
[738, 739, 763, 764]
[740, 741]
[742, 743]
[744, 745, 765, 766]
[746, 747, 767, 768]
[748, 749, 769, 770]
[750, 771]
[751, 752, 772, 773]
[753, 754, 774, 775]
[755, 756, 776, 777]
[757, 778]
[758, 759, 779, 780]
[760, 761, 781, 782]
[762, 763, 783, 784]
[764, 785]
[765, 786]
[766, 767, 787, 788]
[768, 769, 789, 790]
[770, 771, 791, 792]
[772, 793]
[773, 774, 794, 795]
[775, 776, 796, 797]
[777, 778, 798, 799]
[779, 800]
[780, 781, 801, 802]
[782, 783, 803, 804]
[784, 785, 805, 806]
[786, 787, 807, 808]
[788, 789, 809, 810]
[790, 791, 811, 812]
[792, 813]
[793, 794, 814, 815]
[795, 796, 816, 817]
[797, 798, 818, 819]
[799, 820]
[800, 801, 821, 822]
[802, 803, 823, 824]
[804, 805, 825, 826]
[806, 827]
[807, 828]
[808, 809, 829, 830]
[810, 811, 831, 832]
[812, 813, 833, 834]
[814, 835]
[815, 816, 836, 837]
[817, 818, 838, 839]
[819, 820, 840, 841]
[821, 842]
[822, 823, 843, 844]
[824, 825, 845, 846]
[826, 827, 847, 848]
H_Z (414 checks, sparse supports)
[0, 1, 28, 29]
[2, 3, 30, 31]
[4, 5, 32, 33]
[6, 34]
[7, 8, 35, 36]
[9, 10, 37, 38]
[11, 12, 39, 40]
[13, 41]
[14, 15, 42, 43]
[16, 17, 44, 45]
[18, 19, 46, 47]
[20, 48]
[21, 22, 49, 50]
[23, 24, 51, 52]
[25, 26, 53, 54]
[27, 55]
[28, 56]
[29, 30, 57, 58]
[31, 32, 59, 60]
[33, 34, 61, 62]
[35, 63]
[36, 37, 64, 65]
[38, 39, 66, 67]
[40, 41, 68, 69]
[42, 70]
[43, 44, 71, 72]
[45, 46, 73, 74]
[47, 48, 75, 76]
[49, 77]
[50, 51, 78, 79]
[52, 53, 80, 81]
[54, 55, 82, 83]
[56, 57, 84, 85]
[58, 59, 86, 87]
[60, 61, 88, 89]
[62, 90]
[63, 64, 91, 92]
[65, 66, 93, 94]
[67, 68, 95, 96]
[69, 97]
[70, 71, 98, 99]
[72, 73, 100, 101]
[74, 75, 102, 103]
[76, 104]
[77, 78, 105, 106]
[79, 80, 107, 108]
[81, 82, 109, 110]
[83, 111]
[84, 112]
[85, 86, 113, 114]
[87, 88, 115, 116]
[89, 90, 117, 118]
[91, 119]
[92, 93, 120, 121]
[94, 95, 122, 123]
[96, 97, 124, 125]
[98, 126]
[99, 100, 127, 128]
[101, 102, 129, 130]
[103, 104, 131, 132]
[105, 133]
[106, 107, 134, 135]
[108, 109, 136, 137]
[110, 111, 138, 139]
[112, 113, 140, 141]
[114, 115, 142, 143]
[116, 117, 144, 145]
[118, 146, 147]
[119, 120, 148, 149]
[121, 122, 150, 151]
[123, 124, 152, 153]
[125, 154, 155]
[126, 127, 156, 157]
[128, 129, 158, 159]
[130, 131, 160, 161]
[132, 162, 163]
[133, 134, 164, 165]
[135, 136, 166, 167]
[137, 138, 168, 169]
[139, 170]
[140, 171]
[141, 142, 172, 173]
[143, 144, 174, 175]
[145, 146, 176, 177]
[147, 148, 178, 179]
[149, 150, 180, 181]
[151, 152, 182, 183]
[153, 154, 184, 185]
[155, 156, 186, 187]
[157, 158, 188, 189]
[159, 160, 190, 191]
[161, 162, 192, 193]
[163, 164, 194, 195]
[165, 166, 196, 197]
[167, 168, 198, 199]
[169, 170, 200, 201]
[175, 176, 202, 203]
[177, 178, 204, 205]
[179, 180, 206, 207]
[183, 184, 209, 210]
[185, 186, 211, 212]
[187, 188, 213, 214]
[191, 192, 216, 217]
[193, 194, 218, 219]
[195, 196, 220, 221]
[203, 204, 224, 225]
[205, 206, 226, 227]
[207, 208, 228, 229]
[210, 211, 231, 232]
[212, 213, 233, 234]
[214, 215, 235, 236]
[217, 218, 238, 239]
[219, 220, 240, 241]
[221, 222, 242, 243]
[223, 224, 244, 245]
[225, 226, 246, 247]
[227, 228, 248, 249]
[230, 231, 251, 252]
[232, 233, 253, 254]
[234, 235, 255, 256]
[237, 238, 258, 259]
[239, 240, 260, 261]
[241, 242, 262, 263]
[245, 246, 270, 271]
[247, 248, 272, 273]
[249, 250, 274, 275]
[252, 253, 278, 279]
[254, 255, 280, 281]
[256, 257, 282, 283]
[259, 260, 286, 287]
[261, 262, 288, 289]
[263, 264, 290, 291]
[265, 266, 296, 297]
[267, 268, 298, 299]
[269, 270, 300, 301]
[271, 272, 302, 303]
[273, 274, 304, 305]
[275, 276, 306, 307]
[277, 278, 308, 309]
[279, 280, 310, 311]
[281, 282, 312, 313]
[283, 284, 314, 315]
[285, 286, 316, 317]
[287, 288, 318, 319]
[289, 290, 320, 321]
[291, 292, 322, 323]
[293, 294, 324, 325]
[295, 326]
[296, 327]
[297, 298, 328, 329]
[299, 300, 330, 331]
[301, 302, 332, 333]
[303, 304, 334]
[305, 306, 335, 336]
[307, 308, 337, 338]
[309, 310, 339, 340]
[311, 312, 341]
[313, 314, 342, 343]
[315, 316, 344, 345]
[317, 318, 346, 347]
[319, 320, 348]
[321, 322, 349, 350]
[323, 324, 351, 352]
[325, 326, 353, 354]
[327, 328, 355, 356]
[329, 330, 357, 358]
[331, 332, 359, 360]
[333, 361]
[334, 335, 362, 363]
[336, 337, 364, 365]
[338, 339, 366, 367]
[340, 368]
[341, 342, 369, 370]
[343, 344, 371, 372]
[345, 346, 373, 374]
[347, 375]
[348, 349, 376, 377]
[350, 351, 378, 379]
[352, 353, 380, 381]
[354, 382]
[355, 383]
[356, 357, 384, 385]
[358, 359, 386, 387]
[360, 361, 388, 389]
[362, 390]
[363, 364, 391, 392]
[365, 366, 393, 394]
[367, 368, 395, 396]
[369, 397]
[370, 371, 398, 399]
[372, 373, 400, 401]
[374, 375, 402, 403]
[376, 404]
[377, 378, 405, 406]
[379, 380, 407, 408]
[381, 382, 409, 410]
[383, 384, 411, 412]
[385, 386, 413, 414]
[387, 388, 415, 416]
[389, 417, 418]
[390, 391, 419, 420]
[392, 393, 421, 422]
[394, 395, 423, 424]
[396, 425, 426]
[397, 398, 427, 428]
[399, 400, 429, 430]
[401, 402, 431, 432]
[403, 433, 434]
[404, 405, 435, 436]
[406, 407, 437, 438]
[408, 409, 439, 440]
[410, 441]
[411, 442]
[412, 413, 443, 444]
[414, 415, 445, 446]
[416, 417, 447, 448]
[418, 419, 449, 450]
[420, 421, 451, 452]
[422, 423, 453, 454]
[424, 425, 455, 456]
[426, 427, 457, 458]
[428, 429, 459, 460]
[430, 431, 461, 462]
[432, 433, 463, 464]
[434, 435, 465, 466]
[436, 437, 467, 468]
[438, 439, 469, 470]
[440, 441, 471, 472]
[446, 447, 473, 474]
[448, 449, 475, 476]
[450, 451, 477, 478]
[454, 455, 480, 481]
[456, 457, 482, 483]
[458, 459, 484, 485]
[462, 463, 487, 488]
[464, 465, 489, 490]
[466, 467, 491, 492]
[474, 475, 495, 496]
[476, 477, 497, 498]
[478, 479, 499, 500]
[481, 482, 502, 503]
[483, 484, 504, 505]
[485, 486, 506, 507]
[488, 489, 509, 510]
[490, 491, 511, 512]
[492, 493, 513, 514]
[494, 495, 515, 516]
[496, 497, 517, 518]
[498, 499, 519, 520]
[501, 502, 522, 523]
[503, 504, 524, 525]
[505, 506, 526, 527]
[508, 509, 529, 530]
[510, 511, 531, 532]
[512, 513, 533, 534]
[516, 517, 541, 542]
[518, 519, 543, 544]
[520, 521, 545, 546]
[523, 524, 549, 550]
[525, 526, 551, 552]
[527, 528, 553, 554]
[530, 531, 557, 558]
[532, 533, 559, 560]
[534, 535, 561, 562]
[536, 537, 567, 568]
[538, 539, 569, 570]
[540, 541, 571, 572]
[542, 543, 573, 574]
[544, 545, 575, 576]
[546, 547, 577, 578]
[548, 549, 579, 580]
[550, 551, 581, 582]
[552, 553, 583, 584]
[554, 555, 585, 586]
[556, 557, 587, 588]
[558, 559, 589, 590]
[560, 561, 591, 592]
[562, 563, 593, 594]
[564, 565, 595, 596]
[566, 597]
[567, 598]
[568, 569, 599, 600]
[570, 571, 601, 602]
[572, 573, 603, 604]
[574, 575, 605]
[576, 577, 606, 607]
[578, 579, 608, 609]
[580, 581, 610, 611]
[582, 583, 612]
[584, 585, 613, 614]
[586, 587, 615, 616]
[588, 589, 617, 618]
[590, 591, 619]
[592, 593, 620, 621]
[594, 595, 622, 623]
[596, 597, 624, 625]
[598, 599, 626, 627]
[600, 601, 628, 629]
[602, 603, 630, 631]
[604, 632]
[605, 606, 633, 634]
[607, 608, 635, 636]
[609, 610, 637, 638]
[611, 639]
[612, 613, 640, 641]
[614, 615, 642, 643]
[616, 617, 644, 645]
[618, 646]
[619, 620, 647, 648]
[621, 622, 649, 650]
[623, 624, 651, 652]
[625, 653]
[626, 654]
[627, 628, 655, 656]
[629, 630, 657, 658]
[631, 632, 659, 660]
[633, 661]
[634, 635, 662, 663]
[636, 637, 664, 665]
[638, 639, 666, 667]
[640, 668]
[641, 642, 669, 670]
[643, 644, 671, 672]
[645, 646, 673, 674]
[647, 675]
[648, 649, 676, 677]
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