SudokuCon Quilt
(Eingestellt am 15. April 2025, 21:40 Uhr von jwsinclair)
This puzzle originally appeared as a six-foot-wide physical display at the first SudokuCon, April 3-6, 2025 in Boston, where it was solved by attendees over the course of almost two full days.
Setters
I constructed the central section, while the grids along the perimeter were contributed by (from left to right):
top row: Math Pesto, Michael Lefkowitz, Tyrgannus, Agent, Scojo, ThePedallingPianist, Playmaker6174, Marty Sears
second row: Qodec, Diane Eaton
third row: Crusader175, Matt Tressel
fourth row: Memeristor, FullDeck and Missing a Few Cards
bottom row: Katie Splendor, Malrog, Florian Wortmann, Timotab, rockratzero, dumediat, zegres, Tallcat
With special thanks to sirxemic, Sven Neumann, Cirne, and Ava DiPietro!
Rules
Normal sudoku rules apply within each 9x9 grid (place the digits 1-9 once in each row, column, and 3x3 box), and all clues are standard as defined below. Cells outside 9x9 grids do not contain digits and are ignored for the purpose of cages and line clues (e.g. adjacent digits on a parity line must have the opposite parity even if there is one or more empty cells between them).
Cages: the sum of the digits inside each cage is equal to the small number in the top left corner (if given), and digits cannot repeat within a cage.
Arrows: the sum of the digits along an arrow is equal to the digit in the connected circle, and these digits can repeat if allowed by other rules.
Thermometers: digits on thermometers increase from the bulb. Region sum lines: box borders divide each blue line into segments with the same sum.
German whispers: along green lines, digits differ from their neighbors by at least 5.
Renban lines: purple lines contain a non-repeating set of consecutive digits in any order.
Entropic lines: along peach lines, every set of three adjacent cells contains one low digit (1-3), one middle digit (4-6), and one high digit (7-9).
Parity lines: along red lines, digits alternate between odd and even.
Quadruple circles: a digit inside a white circle must appear in at least one of the four cells surrounding that circle (if a digit repeats in a circle, it must appear twice).
Digits in cells separated by a V sum to 5.
Digits in cells separated by an X sum to 10.
Digits in cells with a shaded square are even.
Digits in cells with a shaded circle are odd.
Digits in cells separated by a white dot are consecutive.
Digits in cells separated by a black dot have a 1:2 ratio (i.e. one is double the other).
Difficulty
I'm setting the initial difficulty at 5* because of the sheer size of the puzzle, but most of the individual grids should be in the 1* or 2* range (some may border on 3*).
Lösungscode: The digit in r1c1 in each grid, in order from left to right and top to bottom (40 digits)
Kommentare
am 27. Dezember 2025, 04:31 Uhr von ZerolAcqua
Same here. I really love this puzzle, but it takes a really long time to load the puzzle, and the gameplay is very laggy as well. I hope someone can provide a solution. :(
am 21. Dezember 2025, 21:40 Uhr von tstaffor
234 minutes in and I just completed my first box!
420 minutes in and a second box down.
422 chained straight into a third.
444 They're starting to fly by!
1123 I accidentally left my computer on all night so the numbers are a bit arbitrary now...
1167 Finished ThePedallingPianist's sudoku square
1178 I had a major setback during this square when realizing hours ago I mistook an arrow for a region sum line and all my pencil marks in this section are incoherent.
1213 Keeping a steady pace.
1242 Just finished Scojo's and Agent's to the left looks so intimidating!
1261 finally disambiguated the bottom left.
am 27. November 2025, 02:46 Uhr von zenas777
finally finished it!actually the second one is so difficult so i used some "help". it's really amazing! I enjoy playing it! thank you all for giving us such interesting games
am 22. September 2025, 20:19 Uhr von Shentsi
Sorry, I haven't solved this great puzzle yet. I have finished 3/4 but find that sudokupad website always stuck when I open it. So I just want to ask maybe someone have ever faced this problem:(
am 12. September 2025, 11:08 Uhr von Vebby
What an amazing effort to create this! Hats off!
am 3. September 2025, 13:11 Uhr von AngelaQ
I'm a total beginner to variant sudoku and it's my first time to complete a huge puzzle like this totally on my own so I'm so excited! It took me almost 2 weeks to finish (at my spare time tho lol). Looking forward to more awesome challenges like this one! I love it so much <3
am 5. August 2025, 18:38 Uhr von minkami
spent over 800min to solve this puzzle
very nice,i like this puzzle
am 20. Mai 2025, 20:37 Uhr von taniabn
Really cool puzzle. Took me forever to finish because I could only work on it for a few minutes every day (whenever I got a break from work). Too bad it doesn't work on mobile, or I would have finished it a lot sooner. I hope we get more massive puzzles like this in the future.
am 20. April 2025, 23:17 Uhr von Virux
What a crazy puzzle set up. Took most of the week to finish. But what a setting achievement! thank you so much. Trully enjoyed it.
am 16. April 2025, 10:54 Uhr von by81996672
The difficulty itself is not high, more suitable for beginners to practice.
am 16. April 2025, 01:36 Uhr von purpl
Awesome work on this project! Such a fun idea and solve.
am 16. April 2025, 00:22 Uhr von mathpesto
Incredible job putting all this together! I’m so glad you asked me to contribute and it was an honor to see the full puzzle in person :)
am 15. April 2025, 23:05 Uhr von jwsinclair
added png/pdf download links
am 15. April 2025, 22:48 Uhr von Piatato
Maybe you could add a link to a more high resolution image, in order to make the puzzle more accessable?
--
Good idea, done :)
am 15. April 2025, 22:07 Uhr von juggler
The physical version of this puzzle at SudokuCon was a huge success, and solvers really got into working on it together. Setting something like this is quite a feat for a number of reasons; Kudos for pulling it off!
am 15. April 2025, 22:01 Uhr von timotab
This is a fantastic puzzle. The way James brought the submitted puzzles together to form a coherent whole was amazing. I wish I'd been able to see the printed out version at SudokoCon, but at least I got to try the whole thing. It took me a while to complete but very well worth it.
One tip, I recommend using the solution check after you've (mostly) completed each grid - it would be horrendous to try and discover an error made somewhere in the overall puzzle once you'd reached the end.
