Anti-sudoku puzzle #1
(Published on 28. January 2020, 12:10 by Nylimb)
Put a number from 1 to 9 in each cell so that in each row, column, and 3x3 box no number occurs exactly once. I.e. if a number occurs at all, it must occur at least twice.
I created most of the puzzle by hand, but used a computer program that I wrote to explore ways to finish it.
The puzzle is available on Penpa.
Solution code: Row 3 and column 8.
Comments
on 24. November 2023, 05:10 by Nylimb
If you'd like to watch someone solve this, see https://www.youtube.com/watch?v=uQnwojobKqk . If you don't speak Russian, then turn on closed captions with autotranslation to your preferred language.
on 22. October 2020, 23:37 by Nylimb
Added penpa link.
on 24. June 2020, 21:05 by Big Tiger
That was intriguing, mind-bending, and as minutes turned into hours, a tad frustrating, ha ha. Nicely done.
on 17. February 2020, 06:54 by Nylimb
Improved terminology.
on 4. February 2020, 19:13 by Phistomefel
What a creative puzzle!
on 2. February 2020, 07:41 by Mody
Sehr kreative Idee :)
on 28. January 2020, 18:39 by Rollo
Eine tolle Idee :-) und ganz schön mühsam, ich muss erstmal kapitulieren und später noch mal von vorn anfangen.
on 28. January 2020, 14:06 by adam001
Very nice!
