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Three at a Time (Posted on 2004-10-26) Difficulty: 3 of 5
There is just one way to go from XXXXOOOO to XOXOXOXO in five moves if *three* adjacent coins are moved at each turn. How?

See The Solution Submitted by Brian Smith    
Rating: 3.5000 (4 votes)

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A little clarification: | Comment 9 of 23 |
(In reply to Solution (I think) by nikki)

Unfortunately this problem was published before I could get a better wording.  I was intending the X's and O's to remain in their exact locations if not being moved, like in <a href="http://perplexus.info/show.php?pid=2407&cid=18342">nikki's recent post</a>.  The intended solution differs from nikki's in that I did not rotate any of the moves, just straight translations.
  Posted by Brian Smith on 2004-10-27 12:52:17

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