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