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If it is solvable I imagine explaining the steps adequately would require an image program or a how-to video... or an audience of knot theorists. –  anon Jul 13 '11 at 8:27
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up vote 7 down vote accepted

This says it's impossible.

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Oh, the notorious Inta Bertuccioni! I should have remembered... –  t.b. Jul 13 '11 at 13:32
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