Quad Code
(Published on 10. April 2024, 11:06 by marty_sears)
Rules:
- Normal sudoku rules apply.
- In this puzzle, each digit from 1-9 is represented by a letter from A-I. You must determine which letter represents which digit. When discovered, these can be entered into the orange boxes at the bottom.
- The 2x2 area surrounding a quad circle must contain all the digits represented by the letters in that circle.
- The digits along a grey line can be divided into one or more non-overlapping groups of adjacent cells, each of which sums to 10.
- The digits in a blue or yellow cage must sum to the total in the top left corner.
- Enter correct digits near the grey fog cells to clear the fog. No guessing is necessary.
Click here to play on the CTC app
Please leave a comment if you enjoy :)
Solution code: Row 1 from left to right
Comments
on 25. October 2024, 18:42 by Hark Vitrina
One of my favorites. Probably 2 stars though.
on 18. October 2024, 21:41 by talldrinkofwater
Stunning. Incredible. So much fun!
There aren't enough adjectives I can use to describe how much joy I got from this. Thank you for setting Marty!
on 9. October 2024, 06:17 by snn
Do you use some sort of computer program to come up with the quad phrases, or is that just your mad genius? Hats off to you Marty!!
Marty: no that was just me thinking of as many words as possible using the letters A-I :)
on 31. August 2024, 08:08 by AdarshN
Marty you are a mad genius, there is a reason you are my single favorite sudoku constructor around. The way the logic flows when turning the letter code back into digits is *chef's kiss* so satisfying and beautiful
on 30. August 2024, 17:05 by McParland57
So nice. Thank you
on 23. August 2024, 07:48 by AsgarArn
Fantastic puzzle
on 11. June 2024, 18:44 by ChinStrap
Definitely one of my favorites. This was great.
on 17. May 2024, 19:42 by chameleon
I had no idea what a bag of fun waits for me when the fog fades! Beg for more like that!
on 8. May 2024, 13:17 by Hydalin
This was one of the greatest puzzles I ever solved! The long line gave me a bit of a headache, but it was my own mistake I made when figuring out the possible combinations. 30 minutes of pure fun - thanks a lot, marty!
on 1. May 2024, 21:46 by DavidH
Maybe the most fun I've ever had solving Sudoku. Solve is smooth with some interesting logic and great easter eggs. Wish I could do this one again.
on 30. April 2024, 17:40 by azsuth
This puzzle starts at eleven and never lets up. Truly incredible. The "key" in row ten is genius, and surprisingly necessary for the solve. One of the rare puzzles I wish I could forget so I could solve again for the first time.
on 28. April 2024, 16:12 by sourcedecay
This is one of the best, if not the best, puzzles I've done this year.
on 23. April 2024, 16:38 by LeiZ123321
excellent puzzle! :)
on 23. April 2024, 16:05 by imhesham
Loved it
on 19. April 2024, 00:58 by ViKingPrime
Beautiful. Elegant. Cheeky.
Only Marty Sears could create a puzzle like this; this puzzle is destined to be included in any list of top puzzles, ever. Truly one of a kind.
on 17. April 2024, 06:02 by Agent
A work of art, thanks!
on 17. April 2024, 01:19 by alexlovi
This has been one of the most beautiful solves ever for me! Loved it!
on 16. April 2024, 23:25 by silent_rob
Wow - I love this puzzle! Honestly one of my favourite puzzles of all time. The logic and the humour are simply outstanding (it regularly had me smiling and chuckling throughout). At first it seemed a little intimidating but it was a smooth solve and I never felt stuck. Thanks so much, Marty!
on 16. April 2024, 05:59 by Drewpacabra
Genuinely one of the best puzzles I have ever solved!
on 14. April 2024, 17:07 by Klausku
This puzzle is absolutely brilliant. The composition of the yellow cage in mid-solve was my favourite part.
on 14. April 2024, 07:58 by LehanLehan
A humor in a perfectly constructed puzzle -- this is a mark of a true genius. Thank you very much,Marty.
on 14. April 2024, 06:15 by blackjackfitz
Fun!
on 14. April 2024, 04:14 by juggler
Amazing! Lovely discoveries throughout, and very thematic ones as well. I enjoyed this a lot.
on 14. April 2024, 03:12 by abihummel
A stunning puzzle! Quite approachable, really, for those willing to keep at it. One of my all-time faves!
on 12. April 2024, 21:58 by PuzzleDoubt
After a few false starts because I interpreted the rules wrong and thought the long line was a series of 2-cell pairs that equal ten. Then I had to figure out how to turn on the lettering tool because my colors were driving me mad.
Incredible work and I can't believe you were able to set it all with actual words that played right into the theme! Brilliant!
on 12. April 2024, 21:04 by Suxamethonium
Absolutely beautiful! Took me just over an hour but every minute was wonderful. When the letters fall into place is one of those super satisfying sudoku moments that is the sign of a great puzzle.
on 12. April 2024, 20:26 by ninjamunk
A proper masterpiece!!!!
on 12. April 2024, 11:46 by ForzaFcu
amazing puzzle. so much fun
on 12. April 2024, 10:45 by Lion Crow
923 7562
Marty: I like what you did there :)
on 12. April 2024, 03:27 by Crabbsy Malone
One of my favourite puzzles I've done - completely enjoyable throughout
on 11. April 2024, 19:08 by sacklunch
Another absolute classic from one of the world's best setters. Approachable and joyously fun from start to finish. I loved it!
on 11. April 2024, 18:25 by antiknight
This is basically a cute quads puzzle xD
on 11. April 2024, 16:18 by koba1917
wow, loved this puzzle on so many levels! Especially loved the yellow cage5!
on 11. April 2024, 15:57 by matiasv5
If there was a category above "very nice", I would give it to this puzzle. You made me start my day with a smile :)
on 11. April 2024, 15:34 by GeorgeTheToad2
This puzzle has everything and everybody should give it a go. Wonderful, witty, words. Puzzle of the century. Thank you Marty for setting and sharing your wisdom.
on 11. April 2024, 14:33 by docpayce
This is my absolute favorite puzzle of 2024! This was hilarious!
Great great puzzle! So damn much fun!
on 11. April 2024, 08:42 by ozgaz
Absolutely delightful - really enjoyable solve.
on 11. April 2024, 01:06 by ThePedallingPianist
Hello YouTube!
on 10. April 2024, 23:51 by pazqo
Wow, what an amazing puzzle. Plenty of discoveries and details. Best fow ever!
on 10. April 2024, 23:02 by heliopolix
A FIB: I DIE!
on 10. April 2024, 22:53 by Deino42
The logic is quite linear until the end with the long line where the break-in is a satisfying puzzle that I feel silly spending a couple minutes longer than I should’ve. Despite my several silly coloring mistakes, this is still one of my favorite puzzles to date, and I highly recommend everyone to try it!
on 10. April 2024, 22:08 by Silverscree
This is immediately one of my all-time favourites! So much cheeky humour hidden in here. I personally think 3 stars is totally appropriate for this puzzle too. I had to really think about stuff without ever being too stuck on any one step
on 10. April 2024, 20:36 by Caconym
Very nice puzzle. Would recommend anyone scared of the 3 stars to still try it as I found it to be a rewarding and fast solve
on 10. April 2024, 20:22 by Calvinball
How to insert humor into Sudoku without making it feel memey or cringe, and giving the solver a rewarding solve path the entire way through.
on 10. April 2024, 20:19 by wuc
Very enjoyable. Great fun thx.
on 10. April 2024, 19:02 by Franjo
You did it again! A wonderful puzzle, full of little jokes. How I loved solving this. Wished that took me a little bit longer… Thank you very much for all the fun I had.
on 10. April 2024, 16:41 by Fool on Hill
Beautifully done
on 10. April 2024, 16:25 by Ragna
Wow!!!
on 10. April 2024, 15:47 by ___
fun solve path and easter eggs throughout. thanks marty!
on 10. April 2024, 14:49 by OGRussHood
Nice flow with some cool Easter eggs. Three stars is a bit generous. Took me under a half-hour to solve.
on 10. April 2024, 14:26 by OlafLemme
So much fun! Really loved the use of the fog here. Gorgeous idea and execution.
on 10. April 2024, 13:44 by Debba
Most enjoyable! Thanks
on 10. April 2024, 13:09 by erml
Brilliant execution of a nice idea. Some very cool moments, thannx!
on 10. April 2024, 12:41 by 9Rookienumbers
Loved it! Thanks
on 10. April 2024, 12:02 by Steven R
Fun puzzle, thanks! :)
