Consider 9 dots arranged in a three by three square. Connect all these 9 points with four lines without lifting your pen from the paper.

(In reply to more difficult by Cory Taylor)

exactly the same problem, but replace "four" with "three". Can you do it now? There are two wyas that I can see it done, both invlove a little trickery.

Care to share them?

Posted by levik on 2003-02-18 16:49:04