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Puzzling

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  • $\begingroup$ So, I saw your other answer and understood it. But, I don't understand this answer of yours. Specifically, I don't understand how we can let overlap be any length including 0 . Can you please explain what you are trying to say ? $\endgroup$
    – Hemant Agarwal
    Commented Feb 6, 2023 at 6:24
  • 1
    $\begingroup$ This would have been my answer too. Maybe this solution needs the extra step of first asserting that the puzzle has a unique solution (the puzzle text states that "there is enough information"). If the solution is unique, and we have no information of the size of the overlap, then the perimeter must be independent of the size of the overlap, and we can set it to any value between 0 and 9, including the limit of the overlap approaching 0. $\endgroup$
    – Fillet
    Commented Feb 6, 2023 at 8:21
  • $\begingroup$ Given that there is a solution, then "overlap could be any length" and 0 makes it easy. IMO, the quick and most insightful way to solve this. $\endgroup$
    – chux - Reinstate Monica
    Commented Feb 7, 2023 at 16:52