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