"Find a planar embedding or prove that one does not exist"

[profgreg]

So went an infamous graph theory problem some years ago... and so it went today while playing level 4 of Planarity. This game is not hard at level 4, but this time I was stumped! After having no luck for about 5 minutes, I thought maybe I'd just missed something obvious, so I hit "Shuffle Vertices" and tried again. After a second failed effort,

Comments

[jmpava]

Oh, is THAT what you were up to playing that thing for, like, 2 hours this morning at work... :-P