Zip-a-Dee-Doo-Dah (Zipper Lines)
(Published on 7. November 2023, 18:45 by gdc)
This is probably the most approachable Zipper Lines puzzle I have published so far (even compared to the 6x6) and is meant as an introduction-puzzle to the ruleset. As always, thanks Jaze for the constraint idea and thanks to the testers on the CtC-fan discord for solving/commenting. Hope you enjoy!
- Normal sudoku rules apply.
- Digits an equal distance from the center of a lavender 'Zipper Line' must sum to the digit in the middle of that line.
- Digits on the marked diagonals may not repeat.
Play Online: CtC, CtC (brighter lines), f-puzzles
Example Puzzle
Here is a 4 by 4 example from Jaze (left) and it's solution (right). Notice how the ends of each line sum to the digit in the center of the line. Additionally, the long line also contains two more sums 4=1+3=1+3=2+2. You can play the example here.
Do you want to solve more?
Click here to search for more Zipper Lines puzzles on LMD.
Solution code: Row 5
Comments
on 20. February 2024, 17:21 by DonQuichopp
Man, what struggles I had with this puzzle. But it's all on me ;-) kinda proud though that I could solve it anyways :-)) thanks for this approachable zipper line sudoku!
on 21. November 2023, 12:38 by KingIsulgard
Nice new ruleset!
on 20. November 2023, 03:58 by sdholmes
Beautiful puzzle. Such a fun one to solve.
on 10. November 2023, 22:10 by JR_pianoman
A wonderfully constructed puzzle with a clear and elegant solution path.
on 9. November 2023, 15:51 by gdc
update f-puzzles link
on 9. November 2023, 09:14 by gdc
Thanks Flinty. The puzzle you sent me for a test solve was great! I'm sure people will love it.
on 9. November 2023, 07:02 by DarrenBurnett
My first time doing a zipper line. This puzzle had many wow moments as I began to understand some of the restrictions of placing certain numbers in the line. A lovely puzzle.
on 9. November 2023, 04:03 by ViKingPrime
I think this is honestly the best of the bunch so far (in terms of beginner level difficulty). It's not an easy thing to set a non-trivial 1-star difficulty puzzle and this one flows so, so beautifully.
on 8. November 2023, 22:55 by Flinty
Even more approachable when you’ve been looking at zipper logic nonstop for days. Haha. Great puzzle.
on 8. November 2023, 13:11 by Montikulum
Nice title reference there ;)
on 8. November 2023, 00:50 by Jreg
This was marvelous! but took me almost an hour for some reason. The break-in is very well hidden. Rated 2 stars for difficulty.
on 7. November 2023, 21:33 by gdc
Thanks sujoyku! I totally see how some of my earlier zipper puzzles can be too much for a first contact with the ruleset. After I introduced this constraint in "A Totally Balanced Approach", I wanted to create more introduction-level zipper puzzles but always got sidetracked by more complex ideas offered by those lines. Really glad to hear that this was a comfortable and flowy solve for you!
on 7. November 2023, 20:51 by sujoyku
Thank you for this nice puzzle, gdc! I have solved a few zipper line puzzles before this one, but did not feel very confident with them. Therefore, this puzzle was a great opportunity to get more familiar and comfortable with this variant. The solve felt approachable and had a nice flow to it. Thank you for setting and sharing!
on 7. November 2023, 20:00 by abadx
A very nice introduction to zipper lines. Congrats for the nice examples given
