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6 votes

Swap the positions of the 4 chess knights

lnx's user avatar
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9 votes

Visiting every digit

Proof that Daniel Mathias' solution is optimal:
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9 votes
Accepted

Visiting every digit

The permutation requires a total of This is a slight alteration (a partial reversal) of Culver Kwan's excellent find:
Daniel Mathias's user avatar
6 votes

Visiting every digit

I constructed With I think it is optimal?
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0 votes
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Justifying a redouble

Here is the intended solution:
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