Do you see a tie in the image that is black?
No, there is a tie but it is blue.
    src        edge_attr  dst
0     1      in front of    3
1     1  to the right of   13
2     1  to the right of    9
3     1  to the right of    3
4     1  to the right of    8
5     1  to the right of    6
6     3  to the right of    5
7     3           behind    1
8     3   to the left of    1
9     4   to the left of    8
10    5               on    0
11    5   to the left of    6
12    5   to the left of    3
13    6  to the right of    5
14    6   to the left of    1
15    7   to the left of   12
16    7   to the left of    9
17    8   to the left of    1
18    8  to the right of    4
19    9   to the left of    1
20    9  to the right of    7
21   10  to the right of   12
22   12  to the right of    7
23   12   to the left of   10
24   13   to the left of    1