What's the name of this famous puzzle?

Question

There's a paper and pen puzzle that's supposed to be impossible to crack. It involves you drawing six boxes, three on top of three with spaces and you have to put lines from each one to each one without crossing lines. I used to know it as the 'gas, water and electricity trick' as though you had to supply three utilities to three houses. Not a very good description but I think you will get my drift. Where can I find this puzzle online and/or it's solution? Thanks!

Answer 1

Here it is, called the THREE UTILITIES PUZZLE:

http://www.cut-the-knot.org/do_you_know/3Utilities.shtml

and here, as WATER, GAS, ELECTRICITY:

http://www.fionasplace.net/WaterGasElectricity.html

or here, as GAS, WATER, ELECTRICITY:

http://puzzle.dse.nl/harder/index_us.html#gas_water_electricity

or here, as the UTILITIES PUZZLE:

http://www.brainbashers.com/showpuzzles.asp?puzzle=ZKGX

Answer 2

I was shown this puzzle 40 years ago. It is definitely impossible.

Answer 3

No solution ....being trying since i was 14 ...now 45 ....i shall try again , but you end up with a line in the way every time .....Thanks for that memory arrrrrrrr

Answer 4

the solution is - - - - - - - you can only do eight of the nine lines

so it is an impossibility (eye think)

Answer 5

try http://www.supuzzle.com/