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No Safety from the Queen (Posted on 2004-09-23) Difficulty: 3 of 5
Given a 5x5 chess board, place the fewest number of queens possible on the board such that no queens are under attack but every other space is under attack.

See The Solution Submitted by logischer Verstand    
Rating: 3.0000 (7 votes)

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Solution re: Solution... (This is real...) | Comment 13 of 14 |
(In reply to Solution... by Matt)

Well, I didn't want to use any resources, so I just tried to figure it out...
After a quick trip to Mathworld, which I knew had the answer, it actually is 3. Go to http://mathworld.wolfram.com/QueensProblem.html and look at the second table. It is a hard problem because only 2 arrangements exist.

  Posted by Matt on 2004-12-08 02:36:50

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