Either Way Up
(Published on 26. May 2024, 13:12 by marty_sears)
In my recent collab with Justin Vitanza (AKA Puzzle Pusher), called Chock-a-Block, we invented an Anti-Kropki line. We were both rather fond of the logic it produced, so I have made a puzzle with just those and nothing else.
Rules:
- Normal sudoku rules apply.
- Each line is an ANTI-KROPKI line. No two digits anywhere on an anti-kropki line may be consecutive, nor may they have a 1:2 ratio (one being double the other)... but digits may repeat on a line if allowed by sudoku!
Please leave a comment if you enjoy :)
Solution code: Column 2 reading downwards
Comments
on 4. July 2024, 02:10 by ChinStrap
3* feels right but definitely more approachable than first seems. Great great puzzle
on 24. June 2024, 12:35 by Jackson Philion
Cool break in and a really smooth puzzle! The rotational symmetry (of even the given digits!) was a fun idea, and made even cooler by the fact that I didn't feel like I could just repeat whole blocks of logic on the other side.
on 4. June 2024, 23:28 by Pulsar
Gorgeous puzzle. I always have a soft spot for symmetry :-)
One of my own puzzles is a kreska sudoku (in Polish, kropki = dot, kreska = line), but I've never explored its negative cousin. Either way, it's an underappreciated constraint.
on 3. June 2024, 06:41 by cygne
Delightful break-in. Loved every moment!
on 28. May 2024, 07:13 by vorash00
Took longer than it should have but brilliant nonetheless.
on 27. May 2024, 02:21 by Ratfinkz
Another Marty beaut!!! Beautiful logic in here, very well telegraphed! Thank you
on 27. May 2024, 01:03 by alexsmart
I haven't finished the puzzle yet, but I just realized what the title meant. I am in awe with the symmetry and how you managed to disambiguate to a unique solution. What a beautiful construction!
on 26. May 2024, 20:49 by ViKingPrime
Nice.
on 26. May 2024, 15:03 by Ragna
Wonderful puzzle! Thanks. :-))
on 26. May 2024, 14:50 by sanabas
Delightful. Agree it felt a lot easier than 4*
on 26. May 2024, 14:26 by bansalsaab
Thanks BBB.
@marty beautiful puzzle. Only feedback i have is that it was difficult to see pencilmarks with the color of the lines. Difficulty i believe was less than 4*
Marty: Thanks Bansalsaab, I've now made the lines a bit of a lighter shade
