If you want an explanation, you'll have to ask Snickerer, who appears to be one of the only ones who knows.1)2) 3)

1)
Also the one who told you to look at Graph Theory and didn't put anything in the link.
2)
Don't complain though, if anything HAD been put here it would have probably just melted your brains.
3)
Said Joker has been called away and will likely not have the leisure to finish this properly for some days. You might ask DeadMeat in the meantime if you wish.