| Step | Hyp | Ref
| Expression |
| 1 | | ovex 6678 |
. . . 4
     |
| 2 | | s6cli 13629 |
. . . . 5
                      Word  |
| 3 | 2 | elexi 3213 |
. . . 4
                       |
| 4 | 1, 3 | opvtxfvi 25889 |
. . 3
Vtx                                    |
| 5 | 4 | eqcomi 2631 |
. 2
    Vtx                                |
| 6 | | 3nn0 11310 |
. . 3
 |
| 7 | | 0elfz 12436 |
. . 3

      |
| 8 | 6, 7 | ax-mp 5 |
. 2
     |
| 9 | 1, 3 | opiedgfvi 25890 |
. . 3
iEdg                                                      |
| 10 | 9 | eqcomi 2631 |
. 2
                      iEdg                                |
| 11 | | s1cli 13384 |
. . 3
       Word  |
| 12 | | df-s7 13598 |
. . 3
                                                ++          |
| 13 | | eqid 2622 |
. . . 4
         |
| 14 | | eqid 2622 |
. . . 4
                                                   |
| 15 | | eqid 2622 |
. . . 4
                                                                 |
| 16 | 13, 14, 15 | konigsbergssiedgw 27111 |
. . 3
                        Word
       Word                                                 ++                                Word       
      
   |
| 17 | 2, 11, 12, 16 | mp3an 1424 |
. 2
                      Word       
      
  |
| 18 | | s5cli 13628 |
. . . . . 6
                   Word  |
| 19 | 18 | elexi 3213 |
. . . . 5
                    |
| 20 | 1, 19 | opvtxfvi 25889 |
. . . 4
Vtx                                 |
| 21 | 20 | eqcomi 2631 |
. . 3
    Vtx                             |
| 22 | 1, 19 | opiedgfvi 25890 |
. . . 4
iEdg                                                |
| 23 | 22 | eqcomi 2631 |
. . 3
                   iEdg                             |
| 24 | | s2cli 13625 |
. . . 4
          Word  |
| 25 | | s5s2 13680 |
. . . 4
                                             ++
            |
| 26 | 13, 14, 15 | konigsbergssiedgw 27111 |
. . . 4
                     Word           Word                                              ++                                Word                  |
| 27 | 18, 24, 25, 26 | mp3an 1424 |
. . 3
                   Word              
  |
| 28 | | s4cli 13627 |
. . . . . . 7
                Word  |
| 29 | 28 | elexi 3213 |
. . . . . 6
                 |
| 30 | 1, 29 | opvtxfvi 25889 |
. . . . 5
Vtx                              |
| 31 | 30 | eqcomi 2631 |
. . . 4
    Vtx                          |
| 32 | 1, 29 | opiedgfvi 25890 |
. . . . 5
iEdg                                          |
| 33 | 32 | eqcomi 2631 |
. . . 4
                iEdg                          |
| 34 | | s3cli 13626 |
. . . . 5
             Word  |
| 35 | | s4s3 13676 |
. . . . 5
                                          ++                |
| 36 | 13, 14, 15 | konigsbergssiedgw 27111 |
. . . . 5
                  Word              Word                                           ++                                Word                  |
| 37 | 28, 34, 35, 36 | mp3an 1424 |
. . . 4
                Word                 |
| 38 | | s3cli 13626 |
. . . . . . . 8
             Word  |
| 39 | 38 | elexi 3213 |
. . . . . . 7
              |
| 40 | 1, 39 | opvtxfvi 25889 |
. . . . . 6
Vtx                           |
| 41 | 40 | eqcomi 2631 |
. . . . 5
    Vtx                       |
| 42 | 1, 39 | opiedgfvi 25890 |
. . . . . 6
iEdg                                    |
| 43 | 42 | eqcomi 2631 |
. . . . 5
             iEdg                       |
| 44 | | s4cli 13627 |
. . . . . 6
                Word  |
| 45 | | s3s4 13678 |
. . . . . 6
                                       ++                   |
| 46 | 13, 14, 15 | konigsbergssiedgw 27111 |
. . . . . 6
               Word                 Word                                        ++                                Word                  |
| 47 | 38, 44, 45, 46 | mp3an 1424 |
. . . . 5
             Word                 |
| 48 | | s2cli 13625 |
. . . . . . . . . 10
          Word  |
| 49 | 48 | elexi 3213 |
. . . . . . . . 9
           |
| 50 | 1, 49 | opvtxfvi 25889 |
. . . . . . . 8
Vtx                        |
| 51 | 50 | eqcomi 2631 |
. . . . . . 7
    Vtx                    |
| 52 | 1, 49 | opiedgfvi 25890 |
. . . . . . . 8
iEdg                              |
| 53 | 52 | eqcomi 2631 |
. . . . . . 7
          iEdg                    |
| 54 | | s5cli 13628 |
. . . . . . . 8
                   Word  |
| 55 | | s2s5 13679 |
. . . . . . . 8
                                    ++                      |
| 56 | 13, 14, 15 | konigsbergssiedgw 27111 |
. . . . . . . 8
            Word
                   Word                                     ++                                Word       
      
   |
| 57 | 48, 54, 55, 56 | mp3an 1424 |
. . . . . . 7
          Word       
      
  |
| 58 | | s1cli 13384 |
. . . . . . . . . . . 12
       Word  |
| 59 | 58 | elexi 3213 |
. . . . . . . . . . 11
        |
| 60 | 1, 59 | opvtxfvi 25889 |
. . . . . . . . . 10
Vtx                     |
| 61 | 60 | eqcomi 2631 |
. . . . . . . . 9
    Vtx                 |
| 62 | 1, 59 | opiedgfvi 25890 |
. . . . . . . . . 10
iEdg                        |
| 63 | 62 | eqcomi 2631 |
. . . . . . . . 9
       iEdg                 |
| 64 | | s6cli 13629 |
. . . . . . . . . 10
                      Word  |
| 65 | | s1s6 13672 |
. . . . . . . . . 10
                                 ++
                        |
| 66 | 13, 14, 15 | konigsbergssiedgw 27111 |
. . . . . . . . . 10
         Word                       Word                                  ++                                Word                  |
| 67 | 58, 64, 65, 66 | mp3an 1424 |
. . . . . . . . 9
       Word              
  |
| 68 | | 0ex 4790 |
. . . . . . . . . . . . 13
 |
| 69 | 1, 68 | opvtxfvi 25889 |
. . . . . . . . . . . 12
Vtx              |
| 70 | 69 | eqcomi 2631 |
. . . . . . . . . . 11
    Vtx          |
| 71 | 1, 68 | opiedgfvi 25890 |
. . . . . . . . . . . 12
iEdg          |
| 72 | 71 | eqcomi 2631 |
. . . . . . . . . . 11
iEdg          |
| 73 | | wrd0 13330 |
. . . . . . . . . . 11
Word              
  |
| 74 | | eqid 2622 |
. . . . . . . . . . . 12
 |
| 75 | 70, 72 | vtxdg0e 26370 |
. . . . . . . . . . . 12
        VtxDeg              |
| 76 | 8, 74, 75 | mp2an 708 |
. . . . . . . . . . 11
 VtxDeg             |
| 77 | | 1nn0 11308 |
. . . . . . . . . . . 12
 |
| 78 | | 1le3 11244 |
. . . . . . . . . . . 12
 |
| 79 | | elfz2nn0 12431 |
. . . . . . . . . . . 12
    

   |
| 80 | 77, 6, 78, 79 | mpbir3an 1244 |
. . . . . . . . . . 11
     |
| 81 | | ax-1ne0 10005 |
. . . . . . . . . . 11
 |
| 82 | | s0s1 13667 |
. . . . . . . . . . . 12
        ++          |
| 83 | 62, 82 | eqtri 2644 |
. . . . . . . . . . 11
iEdg                 ++          |
| 84 | 70, 8, 72, 73, 76, 60, 80, 81, 83 | vdegp1bi 26433 |
. . . . . . . . . 10
 VtxDeg                      |
| 85 | | 0p1e1 11132 |
. . . . . . . . . 10
   |
| 86 | 84, 85 | eqtri 2644 |
. . . . . . . . 9
 VtxDeg                    |
| 87 | | 2nn0 11309 |
. . . . . . . . . 10
 |
| 88 | | 2re 11090 |
. . . . . . . . . . 11
 |
| 89 | | 3re 11094 |
. . . . . . . . . . 11
 |
| 90 | | 2lt3 11195 |
. . . . . . . . . . 11
 |
| 91 | 88, 89, 90 | ltleii 10160 |
. . . . . . . . . 10
 |
| 92 | | elfz2nn0 12431 |
. . . . . . . . . 10
    

   |
| 93 | 87, 6, 91, 92 | mpbir3an 1244 |
. . . . . . . . 9
     |
| 94 | | 2ne0 11113 |
. . . . . . . . 9
 |
| 95 | | df-s2 13593 |
. . . . . . . . . 10
                  ++          |
| 96 | 52, 95 | eqtri 2644 |
. . . . . . . . 9
iEdg                           ++
         |
| 97 | 61, 8, 63, 67, 86, 50, 93, 94, 96 | vdegp1bi 26433 |
. . . . . . . 8
 VtxDeg                         |
| 98 | | 1p1e2 11134 |
. . . . . . . 8
   |
| 99 | 97, 98 | eqtri 2644 |
. . . . . . 7
 VtxDeg                       |
| 100 | | nn0fz0 12437 |
. . . . . . . 8

      |
| 101 | 6, 100 | mpbi 220 |
. . . . . . 7
     |
| 102 | | 3ne0 11115 |
. . . . . . 7
 |
| 103 | | df-s3 13594 |
. . . . . . . 8
                        ++          |
| 104 | 42, 103 | eqtri 2644 |
. . . . . . 7
iEdg                                 ++          |
| 105 | 51, 8, 53, 57, 99, 40, 101, 102, 104 | vdegp1bi 26433 |
. . . . . 6
 VtxDeg                            |
| 106 | | 2p1e3 11151 |
. . . . . 6
   |
| 107 | 105, 106 | eqtri 2644 |
. . . . 5
 VtxDeg                          |
| 108 | | df-s4 13595 |
. . . . . 6
                              ++          |
| 109 | 32, 108 | eqtri 2644 |
. . . . 5
iEdg                                       ++
         |
| 110 | 41, 8, 43, 47, 107, 30, 80, 81, 93, 94, 109 | vdegp1ai 26432 |
. . . 4
 VtxDeg                             |
| 111 | | df-s5 13596 |
. . . . 5
                                    ++          |
| 112 | 22, 111 | eqtri 2644 |
. . . 4
iEdg                                             ++          |
| 113 | 31, 8, 33, 37, 110, 20, 80, 81, 93, 94, 112 | vdegp1ai 26432 |
. . 3
 VtxDeg                                |
| 114 | | df-s6 13597 |
. . . 4
                                          ++          |
| 115 | 9, 114 | eqtri 2644 |
. . 3
iEdg                                                   ++
         |
| 116 | 21, 8, 23, 27, 113, 4, 93, 94, 101, 102, 115 | vdegp1ai 26432 |
. 2
 VtxDeg                                   |
| 117 | | konigsberg.v |
. . 3
     |
| 118 | | konigsberg.e |
. . 3
                          |
| 119 | | konigsberg.g |
. . 3
    |
| 120 | 117, 118,
119 | konigsbergvtx 27106 |
. 2
Vtx       |
| 121 | 117, 118,
119 | konigsbergiedg 27107 |
. . 3
iEdg                            |
| 122 | 121, 12 | eqtri 2644 |
. 2
iEdg                         ++          |
| 123 | 5, 8, 10, 17, 116, 120, 93, 94, 101, 102, 122 | vdegp1ai 26432 |
1
 VtxDeg      |