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Puzzling

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6
  • $\begingroup$ I feel this will be super tough without a computer. $\endgroup$
    – Jonathan Allan
    Commented Apr 13, 2020 at 19:15
  • 1
    $\begingroup$ @Jonathan Look at this OP's previous puzzles: they're super tough, but usually doable, without computers. $\endgroup$
    – Rand al'Thor
    Commented Apr 13, 2020 at 19:18
  • $\begingroup$ I've double-checked all my steps and I can't find where I made a mistake :-/ but I seem to be getting a contradiction. Maybe it's just too late at night for this ... $\endgroup$
    – Rand al'Thor
    Commented Apr 13, 2020 at 20:36
  • $\begingroup$ Isn't this just Killer with some cells left blank? And why are some of the perimeter cells blank when their value is obvious? $\endgroup$
    – JMP
    Commented Apr 13, 2020 at 20:45
  • $\begingroup$ @JMP How are their values obvious? $\endgroup$
    – Jens
    Commented Apr 13, 2020 at 21:36