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