Quad Snakes
(Published on 24. October 2025, 07:11 by Oatmeal)
This puzzle is inspired by a marty_sears puzzle called Quad Code, a brilliant invention using quad circles with words instead of numbers. Hope you enjoy.
Quad Snakes
Rules:
- Normal sudoku rules apply.
- In this puzzle, the digits from 1-9 are each represented by a letter from A-I. It is up to you to determine which letter represents which digit. Try to keep note of these if you plan to enter the solution code later.
- The 2x2 area surrounding a quad circle must contain all of the digits represented by the letters in that circle.
- Digits along a green line form a palindrome which reads the same forwards and backwards.
- Digits separated by an X sum to 10, digits separated by a V sum to 5. Not all X's and V's are necessarily given.
- Digits in a cage sum to the given value.
- Digits along a purple renban line form a consecutive set of non-repeating digits.
- Cells covered in fog will be lifted when a correct digit is placed (no guessing is required).
Solution code: The letters representing the digits from 1 to 9
Comments
on 26. November 2025, 23:53 by garycblack
Solution code is it's own puzzle. All my marks are gone =(
on 26. October 2025, 12:03 by fishsaltyak
The puzzle was a lot of fun. The solution code on the other hand..... Not so much.
on 25. October 2025, 17:27 by MandaKakes
What a fun concept! Loved the puzzle
on 24. October 2025, 23:47 by Snaques
Puzzle itself was really fun, but the green palindrome and annoying solution code when you already have a grid filled with numbers made the experience a bit less fun.
on 24. October 2025, 23:03 by dzamie
Really fun! The puzzle itself was pretty simple, which made the awkwardness of dealing with letters rather than a numpad a lot more bearable.
I do agree that the solution code is a little awkward, since, as I didn't really need to take notes as I solved, I wound up having to undo and redo through my letter->number replacement steps to write it all down.
on 24. October 2025, 22:35 by Elliebot
Great puzzle! It was a little clunky to solve though. What I've seen other setters do is give us an extra column or row to record our notes on the letter graphing. Maybe for next time?
Author comment: I agree this would be a great idea - except I have no idea how to implement it haha
on 24. October 2025, 20:10 by Rockon101000
I love a quads puzzle, and this certainly was a lovely one.
on 24. October 2025, 19:34 by Rollo
Sehr schön, für mich 3*.
on 24. October 2025, 18:18 by Mozart40
I got bamboozled by a green line which wasn't a german whispers line. To keep track all letters vs numbers relations was pretty exhausting. For me also more a 2 stars puzzle. Neat!
on 24. October 2025, 18:13 by wuc
Definitely a 2* to me too. Great fun. Clever setting. Thx.
on 24. October 2025, 16:33 by Ol-Jay
I was going to rate this puzzle 2 stars, because it felt so difficult in the beginning - until I realised, that I mistaked the palindrome for a German whisper line. XD
Very much fun after that! :)
on 24. October 2025, 15:34 by Zibl
Really nice puzzle! Thank you! :)
on 24. October 2025, 12:26 by SennyK
I HID my FACE in the BAG with ICE to cool down after this amzing puzzle. Only real CHEF could come up with such amazing IDEA. Guys, don't be DEAF and hear me out - you don't need to roll a DICE to find a brilliant puzzle to solve - go with this one. Noone will need to come to your AID, as solving this puzzle was like going in the CAB - fast, though exciting. Don't FEED yourself with ACID and rate this extraordinary puzzle as it deserves - very nice!
The only drawback of this puzzle to me is no possibility to check whether no mistakes were done as grid is being filled with letters instead of digits, and it is very my thing to do to make some stupid mistakes, so I like to occasionally check if I am on a good track.
To sum up - great puzzle, well set, good job!
Author comment: Thanks for the kind words. Well done fitting these random words into a coherent paragraph too.
on 24. October 2025, 12:23 by akurski
Very approachable and absolutely gorgeous
on 24. October 2025, 10:34 by googuee
Nice puzzle! Thanks for sharing.
on 24. October 2025, 07:21 by Oatmeal
added introduction
