Region Sum Nabner Lines / Region Summe Nabner-Linien
(Published on 29. December 2023, 15:29 by PDN777)
Normal sudoku rules apply. The lines in the puzzle are Region Sum Nabner lines. They obey both constraints. To wit: if a digit appears on a Nabner line, then the digits consecutive with it must not appear on that line. Also, digits may not repeat on a Nabner line. And -- the digits along a region sum line must have the same sum in each 3x3 box entered by the line. Digits in a cage must sum to the little number in the upper left, and may not repeat in the cage. Neighboring digits marked with a white Kropki dot are consecutive. Not all dots are given. I think this puzzle is 2.5 stars out of 5 for difficulty for many solvers, mostly for the break-in. As always, comments welcome. Thanks!
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Solution code: First row of puzzle, and fourth column of puzzle (read top to bottom). Enter as a string of 18 digits, no spaces.
Comments
on 1. January 2024, 17:54 by PDN777
@nunc and @michael_787: thank you both for flying PDN Puzzles! :-) Michael - why the 787 in your handle? Are you a pilot? Enquiring minds want to know... ;-)
on 1. January 2024, 17:51 by PDN777
Fixed HTML.
on 30. December 2023, 23:05 by michael_787
Exquisite puzzle with some neat logic. Thanks for setting!
on 30. December 2023, 22:24 by nunc
Beautiful puzzle! Very smooth. Thanks a lot.
on 30. December 2023, 19:45 by PDN777
@anyeyeball, @andreatetta, and @ViKingPrime: Thanks muchly for the comments and solves! Happy New Year!
on 29. December 2023, 23:56 by anyeyeball
I made this puzzle much harder than it really was by forgetting the "region sum lines" rule after I had to pause for an hour or so.
It really is an excellent sudoku with a nice combination of rules. It was quick work after I remembered the rules!
Thanks for setting a very nice puzzle.
on 29. December 2023, 20:25 by andreatetta
Smooth puzzle
on 29. December 2023, 20:13 by ViKingPrime
Love the logic on display here (I feel lucky having worked with something similar to this recently). Your solve will benefit greatly from a bit of thought at the outset and then it should feel like smooth sailing.
on 29. December 2023, 19:44 by PDN777
@MarthaB and @FlyCatcher: whoa! Thanks so much for the glowing reviews! Happy New Year!
on 29. December 2023, 19:06 by MarthaB
Awesome puzzle. Proud to have solved. Lovely combo of Nabner and Region Sum. Thank you.
on 29. December 2023, 17:29 by Flycatcher
Excellent placement of lines and cages!
