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