Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Posting-Version: version B 2.10.1exp 11/4/83; site ihuxn.UUCP
Path: utzoo!linus!philabs!cmcl2!floyd!clyde!ihnp4!ihuxn!mort
From: mort@ihuxn.UUCP (Having trouble.)
Newsgroups: net.puzzle
Subject: "Looks simple" puzzle
Message-ID: <427@ihuxn.UUCP>
Date: Sat, 26-Nov-83 22:45:48 EST
Article-I.D.: ihuxn.427
Posted: Sat Nov 26 22:45:48 1983
Date-Received: Mon, 28-Nov-83 04:43:20 EST
Organization: AT&T Bell Labs, Naperville, Il
Lines: 40

A friend of mine wrote this puzzle on the board and I haven't found
a way to do it except by finding a loophole in the rules.

Here is the board:

-------------------------------------------
!             !              !            !
!             !              !            !
!             !              !            !
!             !              !            !
!             !              !            !
-------------------------------------------
!                    !                    !
!                    !                    !
!                    !                    !
!                    !                    !
!                    !                    !
-------------------------------------------

The puzzle is to draw a line (please not on your terminal screen)
WITHOUT LIFTING THE WRITING INSTRUMENT starting from any point not
on an intersection of lines in such a way that every line segment
is ONCE AND ONLY ONCE touched by your line. Every segment must be
touched once. Look at the middle horizontal line: it has three
segments, each of which must be touched once. You may pass through
a line as long as yo do it only once.

Here is the catch: YOU MUST NOT DRAW OVER YOUR OWN LINE.

I hope I have made the directions clear enough. Ted Brown says it's
impossible. Joe Slotkowski says it is blatantly obvious, and drew a
mess of spaghetti that fit the rules and solved the puzzle, but I
couldn't repeat it.


-- 


		Mort Dubman		AT&T Bell Laboratories
		ihnp4!ihuxn!mort	Naperville, IL.