Nabnabnerner
(Published on 22. September 2023, 18:43 by DarthParadox)
Place the digits 1-9 once into each row, column, and 3x3 box. The grey lines are palindromes and must contain the same sequence of digits in both directions along the line. Digits may not repeat along the marked diagonal.
The gold lines are Double Nabner lines. Each such line contains two equal-sized sets of non-repeating digits such that, within each set, no two digits are consecutive. (However, a digit from one set may be consecutive with a digit from the other set, and the same digit may appear in both sets.) The digits from the two sets may appear in any order on the line.
For example, 133568, 318653, and 136358 are each valid ways to fill a Double Nabner line, because 135 and 368 are two equal-sized sets, neither of which has repeating or consecutive digits.
Online solver: CTC
Solution code: Row 4 then column 8 (18 digits, no spaces)
Comments
on 23. September 2023, 17:21 by chameleon
Nice puzzle!
I had hard times of proving the theory about the sets, but afterwards it was quite smooth.
Pro tip for people who are stuck in the puzzle like me: don't forget that there's a rule about the diagonal :)
on 23. September 2023, 02:32 by bansalsaab
Very nice.
on 22. September 2023, 23:21 by efnenu
Woah! That was fun :)
The setup seemed daunting at first, but I actually really enjoyed distilling the different sets.
It's amazing what you can get from a single 3. Thank you for this puzzle!
on 22. September 2023, 21:00 by wisty
This was fun, thanks! I over-colored the heck out of it :) Several fun steps that made me smile, also not too hard, agree with your assessment on that front.
on 22. September 2023, 20:11 by lmdemasi
What a wild ride. After putting in some obvious stuff, I went from starting blankly for several minutes into a smooth solve path.
Very cool puzzle.
