Lines, Pos of Lines

[Herby]

Where can one find said riddle??

Look at ati's link above: link:s://en.wikipedia.org/wiki/Theorem_on_friends_and_strangers

[Person S]

In 6 double lines, 3 even / 3 odd, 3 high / 3 low, it looks like three friends ...

[mickavelli]

6 uniques minimum 3 friends question is based around the number 9 not 6 -  for anyone going fishing 

[Herby]

based around the number 9 not 6

Hi mickavelli,
How do you see number 9 to be important ?