Bad way to waste your lunch break

[dr4b]

from katybeth

http://home.cwru.edu/~jnt5/Planarity/

OMG CAN'T STOP UNRAVELLING GRAPHS

Comments

[blk]

Same here. My computer decided to reboot while I was one 12, and lost my progress. I had done the previous three levels in < 15 mins each, though. I think I've got the knack.