Parity checks
X-checks 448 (max weight 4) · Z-checks 448 (max weight 4)
H_X (448 checks, sparse supports)
[0, 1]
[2, 3]
[5, 6]
[7, 8]
[10, 11]
[12, 13]
[1, 2, 16, 17]
[3, 4, 18, 19]
[6, 7, 21, 22]
[8, 9, 23, 24]
[11, 12, 26, 27]
[13, 14, 28, 29]
[15, 16, 30, 31]
[17, 18, 32, 33]
[20, 21, 35, 36]
[22, 23, 37, 38]
[25, 26, 40, 41]
[27, 28, 42, 43]
[31, 32, 46, 47]
[33, 34, 48, 49]
[36, 37, 52, 53]
[38, 39, 54, 55]
[41, 42, 58, 59]
[43, 44, 60, 61]
[45, 46, 62, 63]
[47, 48, 64, 65]
[49, 50, 66, 67]
[51, 52, 68, 69]
[53, 54, 70, 71]
[55, 56, 72, 73]
[57, 58, 74, 75]
[59, 60, 76, 77]
[63, 64]
[65, 66, 79, 80]
[67, 68, 81, 82]
[69, 70, 83]
[71, 72, 84, 85]
[73, 74, 86, 87]
[75, 76, 88]
[77, 78]
[89, 90]
[79, 91, 92]
[80, 81, 93, 94]
[82, 83, 95, 96]
[84, 97, 98]
[85, 86, 99, 100]
[87, 88, 101, 102]
[103, 104]
[90, 91, 107, 108]
[92, 93, 109, 110]
[94, 95, 111, 112]
[96, 97, 113, 114]
[98, 99, 115, 116]
[100, 101, 117, 118]
[102, 103, 119, 120]
[104, 105, 121, 122]
[106, 107, 123, 124]
[108, 109, 125, 126]
[112, 113, 128, 129]
[114, 115, 130, 131]
[118, 119, 133, 134]
[120, 121, 135, 136]
[124, 125, 139, 140]
[126, 127, 141, 142]
[129, 130, 145, 146]
[131, 132, 147, 148]
[134, 135, 151, 152]
[136, 137, 153, 154]
[138, 139, 155, 156]
[140, 141, 157, 158]
[142, 143, 159, 160]
[144, 145, 161, 162]
[146, 147, 163, 164]
[148, 149, 165, 166]
[150, 151, 167, 168]
[152, 153, 169, 170]
[156, 157]
[158, 159, 172, 173]
[160, 161, 174, 175]
[162, 163, 176]
[164, 165, 177, 178]
[166, 167, 179, 180]
[168, 169, 181]
[170, 171]
[182, 183]
[172, 184, 185]
[173, 174, 186, 187]
[175, 176, 188, 189]
[177, 190, 191]
[178, 179, 192, 193]
[180, 181, 194, 195]
[196, 197]
[183, 184, 200, 201]
[185, 186, 202, 203]
[187, 188, 204, 205]
[189, 190, 206, 207]
[191, 192, 208, 209]
[193, 194, 210, 211]
[195, 196, 212, 213]
[197, 198, 214, 215]
[199, 200, 216, 217]
[201, 202, 218, 219]
[205, 206, 221, 222]
[207, 208, 223, 224]
[211, 212, 226, 227]
[213, 214, 228, 229]
[217, 218, 232, 233]
[219, 220, 234, 235]
[222, 223, 238, 239]
[224, 225, 240, 241]
[227, 228, 244, 245]
[229, 230, 246, 247]
[231, 232, 248, 249]
[233, 234, 250, 251]
[235, 236, 252, 253]
[237, 238, 254, 255]
[239, 240, 256, 257]
[241, 242, 258, 259]
[243, 244, 260, 261]
[245, 246, 262, 263]
[249, 250]
[251, 252, 265, 266]
[253, 254, 267, 268]
[255, 256, 269]
[257, 258, 270, 271]
[259, 260, 272, 273]
[261, 262, 274]
[263, 264]
[275, 276]
[265, 277, 278]
[266, 267, 279, 280]
[268, 269, 281, 282]
[270, 283, 284]
[271, 272, 285, 286]
[273, 274, 287, 288]
[289, 290]
[276, 277, 293, 294]
[278, 279, 295, 296]
[280, 281, 297, 298]
[282, 283, 299, 300]
[284, 285, 301, 302]
[286, 287, 303, 304]
[288, 289, 305, 306]
[290, 291, 307, 308]
[292, 293, 309, 310]
[294, 295, 311, 312]
[298, 299, 314, 315]
[300, 301, 316, 317]
[304, 305, 319, 320]
[306, 307, 321, 322]
[310, 311, 325, 326]
[312, 313, 327, 328]
[315, 316, 331, 332]
[317, 318, 333, 334]
[320, 321, 337, 338]
[322, 323, 339, 340]
[324, 325, 341, 342]
[326, 327, 343, 344]
[328, 329, 345, 346]
[330, 331, 347, 348]
[332, 333, 349, 350]
[334, 335, 351, 352]
[336, 337, 353, 354]
[338, 339, 355, 356]
[342, 343]
[344, 345, 358, 359]
[346, 347, 360, 361]
[348, 349, 362]
[350, 351, 363, 364]
[352, 353, 365, 366]
[354, 355, 367]
[356, 357]
[368, 369]
[358, 370, 371]
[359, 360, 372, 373]
[361, 362, 374, 375]
[363, 376, 377]
[364, 365, 378, 379]
[366, 367, 380, 381]
[382, 383]
[369, 370, 386, 387]
[371, 372, 388, 389]
[373, 374, 390, 391]
[375, 376, 392, 393]
[377, 378, 394, 395]
[379, 380, 396, 397]
[381, 382, 398, 399]
[383, 384, 400, 401]
[385, 386, 402, 403]
[387, 388, 404, 405]
[391, 392, 407, 408]
[393, 394, 409, 410]
[397, 398, 412, 413]
[399, 400, 414, 415]
[403, 404, 418, 419]
[405, 406, 420, 421]
[408, 409, 424, 425]
[410, 411, 426, 427]
[413, 414, 430, 431]
[415, 416, 432, 433]
[417, 418, 434, 435]
[419, 420, 436, 437]
[421, 422, 438, 439]
[423, 424, 440, 441]
[425, 426, 442, 443]
[427, 428, 444, 445]
[429, 430, 446, 447]
[431, 432, 448, 449]
[435, 436]
[437, 438, 451, 452]
[439, 440, 453, 454]
[441, 442, 455]
[443, 444, 456, 457]
[445, 446, 458, 459]
[447, 448, 460]
[449, 450]
[461, 462]
[451, 463, 464]
[452, 453, 465, 466]
[454, 455, 467, 468]
[456, 469, 470]
[457, 458, 471, 472]
[459, 460, 473, 474]
[475, 476]
[462, 463, 479, 480]
[464, 465, 481, 482]
[466, 467, 483, 484]
[468, 469, 485, 486]
[470, 471, 487, 488]
[472, 473, 489, 490]
[474, 475, 491, 492]
[476, 477, 493, 494]
[478, 479, 495, 496]
[480, 481, 497, 498]
[484, 485, 500, 501]
[486, 487, 502, 503]
[490, 491, 505, 506]
[492, 493, 507, 508]
[496, 497, 511, 512]
[498, 499, 513, 514]
[501, 502, 517, 518]
[503, 504, 519, 520]
[506, 507, 523, 524]
[508, 509, 525, 526]
[510, 511, 527, 528]
[512, 513, 529, 530]
[514, 515, 531, 532]
[516, 517, 533, 534]
[518, 519, 535, 536]
[520, 521, 537, 538]
[522, 523, 539, 540]
[524, 525, 541, 542]
[528, 529]
[530, 531, 544, 545]
[532, 533, 546, 547]
[534, 535, 548]
[536, 537, 549, 550]
[538, 539, 551, 552]
[540, 541, 553]
[542, 543]
[554, 555]
[544, 556, 557]
[545, 546, 558, 559]
[547, 548, 560, 561]
[549, 562, 563]
[550, 551, 564, 565]
[552, 553, 566, 567]
[568, 569]
[555, 556, 572, 573]
[557, 558, 574, 575]
[559, 560, 576, 577]
[561, 562, 578, 579]
[563, 564, 580, 581]
[565, 566, 582, 583]
[567, 568, 584, 585]
[569, 570, 586, 587]
[571, 572, 588, 589]
[573, 574, 590, 591]
[577, 578, 593, 594]
[579, 580, 595, 596]
[583, 584, 598, 599]
[585, 586, 600, 601]
[589, 590, 604, 605]
[591, 592, 606, 607]
[594, 595, 610, 611]
[596, 597, 612, 613]
[599, 600, 616, 617]
[601, 602, 618, 619]
[603, 604, 620, 621]
[605, 606, 622, 623]
[607, 608, 624, 625]
[609, 610, 626, 627]
[611, 612, 628, 629]
[613, 614, 630, 631]
[615, 616, 632, 633]
[617, 618, 634, 635]
[621, 622]
[623, 624, 637, 638]
[625, 626, 639, 640]
[627, 628, 641]
[629, 630, 642, 643]
[631, 632, 644, 645]
[633, 634, 646]
[635, 636]
[647, 648]
[637, 649, 650]
[638, 639, 651, 652]
[640, 641, 653, 654]
[642, 655, 656]
[643, 644, 657, 658]
[645, 646, 659, 660]
[661, 662]
[648, 649, 665, 666]
[650, 651, 667, 668]
[652, 653, 669, 670]
[654, 655, 671, 672]
[656, 657, 673, 674]
[658, 659, 675, 676]
[660, 661, 677, 678]
[662, 663, 679, 680]
[664, 665, 681, 682]
[666, 667, 683, 684]
[670, 671, 686, 687]
[672, 673, 688, 689]
[676, 677, 691, 692]
[678, 679, 693, 694]
[682, 683, 697, 698]
[684, 685, 699, 700]
[687, 688, 703, 704]
[689, 690, 705, 706]
[692, 693, 709, 710]
[694, 695, 711, 712]
[696, 697, 713, 714]
[698, 699, 715, 716]
[700, 701, 717, 718]
[702, 703, 719, 720]
[704, 705, 721, 722]
[706, 707, 723, 724]
[708, 709, 725, 726]
[710, 711, 727, 728]
[714, 715]
[716, 717, 730, 731]
[718, 719, 732, 733]
[720, 721, 734]
[722, 723, 735, 736]
[724, 725, 737, 738]
[726, 727, 739]
[728, 729]
[740, 741]
[730, 742, 743]
[731, 732, 744, 745]
[733, 734, 746, 747]
[735, 748, 749]
[736, 737, 750, 751]
[738, 739, 752, 753]
[754, 755]
[741, 742, 758, 759]
[743, 744, 760, 761]
[745, 746, 762, 763]
[747, 748, 764, 765]
[749, 750, 766, 767]
[751, 752, 768, 769]
[753, 754, 770, 771]
[755, 756, 772, 773]
[757, 758, 774, 775]
[759, 760, 776, 777]
[763, 764, 779, 780]
[765, 766, 781, 782]
[769, 770, 784, 785]
[771, 772, 786, 787]
[775, 776, 790, 791]
[777, 778, 792, 793]
[780, 781, 796, 797]
[782, 783, 798, 799]
[785, 786, 802, 803]
[787, 788, 804, 805]
[789, 790, 806, 807]
[791, 792, 808, 809]
[793, 794, 810, 811]
[795, 796, 812, 813]
[797, 798, 814, 815]
[799, 800, 816, 817]
[801, 802, 818, 819]
[803, 804, 820, 821]
[807, 808]
[809, 810, 823, 824]
[811, 812, 825, 826]
[813, 814, 827]
[815, 816, 828, 829]
[817, 818, 830, 831]
[819, 820, 832]
[821, 822]
[833, 834]
[823, 835, 836]
[824, 825, 837, 838]
[826, 827, 839, 840]
[828, 841, 842]
[829, 830, 843, 844]
[831, 832, 845, 846]
[847, 848]
[834, 835, 851, 852]
[836, 837, 853, 854]
[838, 839, 855, 856]
[840, 841, 857, 858]
[842, 843, 859, 860]
[844, 845, 861, 862]
[846, 847, 863, 864]
[848, 849, 865, 866]
[850, 851, 867, 868]
[852, 853, 869, 870]
[856, 857, 872, 873]
[858, 859, 874, 875]
[862, 863, 877, 878]
[864, 865, 879, 880]
[868, 869, 883, 884]
[870, 871, 885, 886]
[873, 874, 889, 890]
[875, 876, 891, 892]
[878, 879, 895, 896]
[880, 881, 897, 898]
[882, 883, 899, 900]
[884, 885, 901, 902]
[886, 887, 903, 904]
[888, 889, 905, 906]
[890, 891, 907, 908]
[892, 893, 909, 910]
[894, 895, 911, 912]
[896, 897, 913, 914]
[900, 901]
[902, 903, 916, 917]
[904, 905, 918, 919]
[906, 907, 920]
[908, 909, 921, 922]
[910, 911, 923, 924]
[912, 913, 925]
[914, 915]
[916, 926]
[917, 918, 927, 928]
[919, 920, 929, 930]
[921, 931]
[922, 923, 932, 933]
[924, 925, 934, 935]
[926, 927, 936, 937]
[928, 929, 938, 939]
[930, 940]
[931, 932, 941, 942]
[933, 934, 943, 944]
[935, 945]
H_Z (448 checks, sparse supports)
[0, 1, 15, 16]
[2, 3, 17, 18]
[4, 19]
[5, 6, 20, 21]
[7, 8, 22, 23]
[9, 24]
[10, 11, 25, 26]
[12, 13, 27, 28]
[14, 29]
[15, 30]
[16, 17, 31, 32]
[18, 19, 33, 34]
[20, 35]
[21, 22, 36, 37]
[23, 24, 38, 39]
[25, 40]
[26, 27, 41, 42]
[28, 29, 43, 44]
[30, 31, 45, 46]
[32, 33, 47, 48]
[34, 49, 50]
[35, 36, 51, 52]
[37, 38, 53, 54]
[39, 55, 56]
[40, 41, 57, 58]
[42, 43, 59, 60]
[44, 61]
[45, 62]
[46, 47, 63, 64]
[48, 49, 65, 66]
[50, 51, 67, 68]
[52, 53, 69, 70]
[54, 55, 71, 72]
[56, 57, 73, 74]
[58, 59, 75, 76]
[60, 61, 77, 78]
[66, 67, 80, 81]
[68, 69, 82, 83]
[72, 73, 85, 86]
[74, 75, 87, 88]
[79, 80, 92, 93]
[81, 82, 94, 95]
[84, 85, 98, 99]
[86, 87, 100, 101]
[89, 90, 106, 107]
[91, 92, 108, 109]
[93, 94, 110, 111]
[95, 96, 112, 113]
[97, 98, 114, 115]
[99, 100, 116, 117]
[101, 102, 118, 119]
[103, 104, 120, 121]
[105, 122]
[106, 123]
[107, 108, 124, 125]
[109, 110, 126, 127]
[111, 112, 128]
[113, 114, 129, 130]
[115, 116, 131, 132]
[117, 118, 133]
[119, 120, 134, 135]
[121, 122, 136, 137]
[123, 124, 138, 139]
[125, 126, 140, 141]
[127, 142, 143]
[128, 129, 144, 145]
[130, 131, 146, 147]
[132, 148, 149]
[133, 134, 150, 151]
[135, 136, 152, 153]
[137, 154]
[138, 155]
[139, 140, 156, 157]
[141, 142, 158, 159]
[143, 144, 160, 161]
[145, 146, 162, 163]
[147, 148, 164, 165]
[149, 150, 166, 167]
[151, 152, 168, 169]
[153, 154, 170, 171]
[159, 160, 173, 174]
[161, 162, 175, 176]
[165, 166, 178, 179]
[167, 168, 180, 181]
[172, 173, 185, 186]
[174, 175, 187, 188]
[177, 178, 191, 192]
[179, 180, 193, 194]
[182, 183, 199, 200]
[184, 185, 201, 202]
[186, 187, 203, 204]
[188, 189, 205, 206]
[190, 191, 207, 208]
[192, 193, 209, 210]
[194, 195, 211, 212]
[196, 197, 213, 214]
[198, 215]
[199, 216]
[200, 201, 217, 218]
[202, 203, 219, 220]
[204, 205, 221]
[206, 207, 222, 223]
[208, 209, 224, 225]
[210, 211, 226]
[212, 213, 227, 228]
[214, 215, 229, 230]
[216, 217, 231, 232]
[218, 219, 233, 234]
[220, 235, 236]
[221, 222, 237, 238]
[223, 224, 239, 240]
[225, 241, 242]
[226, 227, 243, 244]
[228, 229, 245, 246]
[230, 247]
[231, 248]
[232, 233, 249, 250]
[234, 235, 251, 252]
[236, 237, 253, 254]
[238, 239, 255, 256]
[240, 241, 257, 258]
[242, 243, 259, 260]
[244, 245, 261, 262]
[246, 247, 263, 264]
[252, 253, 266, 267]
[254, 255, 268, 269]
[258, 259, 271, 272]
[260, 261, 273, 274]
[265, 266, 278, 279]
[267, 268, 280, 281]
[270, 271, 284, 285]
[272, 273, 286, 287]
[275, 276, 292, 293]
[277, 278, 294, 295]
[279, 280, 296, 297]
[281, 282, 298, 299]
[283, 284, 300, 301]
[285, 286, 302, 303]
[287, 288, 304, 305]
[289, 290, 306, 307]
[291, 308]
[292, 309]
[293, 294, 310, 311]
[295, 296, 312, 313]
[297, 298, 314]
[299, 300, 315, 316]
[301, 302, 317, 318]
[303, 304, 319]
[305, 306, 320, 321]
[307, 308, 322, 323]
[309, 310, 324, 325]
[311, 312, 326, 327]
[313, 328, 329]
[314, 315, 330, 331]
[316, 317, 332, 333]
[318, 334, 335]
[319, 320, 336, 337]
[321, 322, 338, 339]
[323, 340]
[324, 341]
[325, 326, 342, 343]
[327, 328, 344, 345]
[329, 330, 346, 347]
[331, 332, 348, 349]
[333, 334, 350, 351]
[335, 336, 352, 353]
[337, 338, 354, 355]
[339, 340, 356, 357]
[345, 346, 359, 360]
[347, 348, 361, 362]
[351, 352, 364, 365]
[353, 354, 366, 367]
[358, 359, 371, 372]
[360, 361, 373, 374]
[363, 364, 377, 378]
[365, 366, 379, 380]
[368, 369, 385, 386]
[370, 371, 387, 388]
[372, 373, 389, 390]
[374, 375, 391, 392]
[376, 377, 393, 394]
[378, 379, 395, 396]
[380, 381, 397, 398]
[382, 383, 399, 400]
[384, 401]
[385, 402]
[386, 387, 403, 404]
[388, 389, 405, 406]
[390, 391, 407]
[392, 393, 408, 409]
[394, 395, 410, 411]
[396, 397, 412]
[398, 399, 413, 414]
[400, 401, 415, 416]
[402, 403, 417, 418]
[404, 405, 419, 420]
[406, 421, 422]
[407, 408, 423, 424]
[409, 410, 425, 426]
[411, 427, 428]
[412, 413, 429, 430]
[414, 415, 431, 432]
[416, 433]
[417, 434]
[418, 419, 435, 436]
[420, 421, 437, 438]
[422, 423, 439, 440]
[424, 425, 441, 442]
[426, 427, 443, 444]
[428, 429, 445, 446]
[430, 431, 447, 448]
[432, 433, 449, 450]
[438, 439, 452, 453]
[440, 441, 454, 455]
[444, 445, 457, 458]
[446, 447, 459, 460]
[451, 452, 464, 465]
[453, 454, 466, 467]
[456, 457, 470, 471]
[458, 459, 472, 473]
[461, 462, 478, 479]
[463, 464, 480, 481]
[465, 466, 482, 483]
[467, 468, 484, 485]
[469, 470, 486, 487]
[471, 472, 488, 489]
[473, 474, 490, 491]
[475, 476, 492, 493]
[477, 494]
[478, 495]
[479, 480, 496, 497]
[481, 482, 498, 499]
[483, 484, 500]
[485, 486, 501, 502]
[487, 488, 503, 504]
[489, 490, 505]
[491, 492, 506, 507]
[493, 494, 508, 509]
[495, 496, 510, 511]
[497, 498, 512, 513]
[499, 514, 515]
[500, 501, 516, 517]
[502, 503, 518, 519]
[504, 520, 521]
[505, 506, 522, 523]
[507, 508, 524, 525]
[509, 526]
[510, 527]
[511, 512, 528, 529]
[513, 514, 530, 531]
[515, 516, 532, 533]
[517, 518, 534, 535]
[519, 520, 536, 537]
[521, 522, 538, 539]
[523, 524, 540, 541]
[525, 526, 542, 543]
[531, 532, 545, 546]
[533, 534, 547, 548]
[537, 538, 550, 551]
[539, 540, 552, 553]
[544, 545, 557, 558]
[546, 547, 559, 560]
[549, 550, 563, 564]
[551, 552, 565, 566]
[554, 555, 571, 572]
[556, 557, 573, 574]
[558, 559, 575, 576]
[560, 561, 577, 578]
[562, 563, 579, 580]
[564, 565, 581, 582]
[566, 567, 583, 584]
[568, 569, 585, 586]
[570, 587]
[571, 588]
[572, 573, 589, 590]
[574, 575, 591, 592]
[576, 577, 593]
[578, 579, 594, 595]
[580, 581, 596, 597]
[582, 583, 598]
[584, 585, 599, 600]
[586, 587, 601, 602]
[588, 589, 603, 604]
[590, 591, 605, 606]
[592, 607, 608]
[593, 594, 609, 610]
[595, 596, 611, 612]
[597, 613, 614]
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