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- Path: sparky!uunet!psgrain!ee.und.ac.za!pc030.cc.unp.ac.za!babraham
- From: babraham@unpcs1.cs.unp.ac.za (Bobby Abraham)
- Newsgroups: comp.ai
- Subject: 8 Puzzle (Is it connected)
- Date: Mon, 7 Sep 1992 07:10:34 GMT
- Organization: Dept. Computer Science, UNP
- Lines: 15
- Distribution: world
- Message-ID: <babraham.3.715849833@unpcs1.cs.unp.ac.za>
- NNTP-Posting-Host: pc030.cc.unp.ac.za
-
- I recently gave the 8 puzzle to an Intro AI class. I remember reading that
- the 15 puzzle was not solvable from any position. In other words the graph
- of this problem was not connected.
-
- Can anyone tell me if the same applies to the 8 puzzle? I would be
- interested in the proof as well.
-
- Thank you
- -------------------------------------------------------------------
- Bobby Abraham
- Dept. of Computer Science
- University of Natal, Pietermaritzburg
- email - babraham@unpcs1.cs.unp.ac.za
- abraham@unpsun1.cc.unp.ac.za
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-