| http://www.w3.org/ns/prov#value | - (The any is important, because if you instead specify ... removing one specific clue leaves a puzzle that does not have a unique solution, the answer is trivially 78 clues, as it is possible for a puzzle with only four blank squares, i.e., 77 clues, to have two possible solutions.)posted by DevilsAdvocate at 8:56 AM on March 14, 2012 [3 favorites] > By the way, does anyone know if there is a cl
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