Coordinate Arrows (Sudoku)
(Published on 13. February 2022, 18:17 by Piatato)
Another puzzle that is the result of a collaboration with the great setter Aaronymous — this time in terms of inventing the new constraint that is used in this puzzle. I made a very general suggestion, after which Aaronymous within less than a minute invented the whole constraint and figured out most of the major consequences. Where would I be without their amazing ideas!
A magnificent Coordinate Arrows sudoku, set by Aaronymous, can be found here.
Rules:
1) Normal Sudoku Rules Apply. Every row, column, and box must contain the digits 1-9 with no repeats.
2) Coordinate Arrows Rules Apply. Digits on an arrow spell out the coordinates for the digit that is their sum. The row number is written on the start of the arrow, the column number is written on the arrow tip. If for example an arrow looks like this: -1 4-> then there must be a 5 in r1c4. All the arrows must correspond to different coordinates. Digits may repeat on an arrow if allowed by other rules.
Solve on Penpa+ here.Solve on F-Puzzles here.
Solve in the CTC webapp here.
Solution code: Row 6 and column 6
Comments
on 21. August 2024, 17:38 by The Book Wyrm
Fun puzzle! Took a while to see a few steps, but overall nothing was too difficult. Lot of neat logic.
on 7. March 2024, 23:12 by Christounet
Miraculous ! Thanks :)
on 25. February 2024, 21:18 by Niverio
Absolutely sublime setting! Wonderful puzzle.
on 13. August 2023, 21:43 by Yann
Just perfect !
on 13. June 2023, 00:10 by MatthewDonovan
I found this 5/5 stars but incredibly beautiful to solve. Thank you! :)
on 20. May 2023, 06:59 by OldCaptainWZJ
The way this is solved is just miraculous. A really clever take on an already insteresting and novel rule set.
on 19. May 2023, 16:43 by Agent
Superb puzzle, very clever and original logic with the coordinates!
on 19. May 2023, 00:20 by annaswan
This is such a cool puzzle! Such a simple constraint led to such an interesting set of consequences. The first major break-in was great too. Beautiful job!
on 10. February 2023, 15:26 by Kafkapharnaum
A long time coming, this one! But it certainly wasn't written that I'd never come back to it. And the thing is, um, well, that friend Samish was talking about below, uh... that was me XD So the real puzzle here is, just how either 1- I managed to solve the 16-pack while being apparently unaware of that important piece of information, or 2- how I could forget it so quickly after solving SIXTEEN puzzles of that type haha... But oh well, now properly equipped, I did solve it and could finally enjoy it in all its miraculous glory! :D
on 9. January 2023, 15:26 by dumediat
Perfection in puzzle form, what an absolute masterpiece!
on 5. January 2023, 17:53 by Samish
still so beautiful after the second solve (and not quite easy). This puzzle is magic
—
Thanks a lot! Yeah, this puzzle demotivated me for months, because I knew that it was highly unlikely that I would create/find something so miraculous ever again. XD
on 17. December 2022, 12:09 by AstralSky
Very Nice
on 10. December 2022, 15:34 by mathpesto
Wow! What a brilliant construction!
on 8. December 2022, 07:59 by Nordy
A constant cascade of mind-blowing discoveries. Thank you both for this incredible masterpiece!
on 12. July 2022, 04:24 by Samish
Wow. One of the puzzles I will remember for a very long time. Unbelievably good.
A small comment about the rules (which are obviously clear when carefully read) : a friend and I both missed the uniqueness of each arrow rule, because it came after the example.
—
Thanks a lot! Yeah, it's always hard to know exactly how to formulate these rulesets. I often forget parts of the rules myself as a solver, so I should know to be extra careful, haha!
on 29. June 2022, 15:02 by Vebby
Very interesting variant and great implementation in this puzzle!
-- Thanks a lot! :-D
on 26. March 2022, 18:03 by PrimeWeasel
Really cool!
on 15. March 2022, 06:53 by Phistomefel
What a wonderful idea! Thanks to you and Aaronymous for coming up with this ruleset and many thanks to you, Piatato, for this fun puzzle.
—
Thanks for the solve and comment. I'm very happy to see that you enjoyed it! :D
on 18. February 2022, 15:58 by aruvi
Brilliant puzzle, what a joy to solve! Had to get the ol notebook out and tick and cross out bit by bit until this beauty slowly collapsed, top tier
—
Indeed there is some figuring out that is needed in this puzzle. :-) Thank you for the solve and the lovely comment!
-Piatato
on 16. February 2022, 19:24 by koba1917
Fantastic puzzle! Was bashing my head against the wall until it finally clicked. Still difficult after that but much smoother!
—
Thank you for the solve and the very nice comment! I'm happy that your head prevailed. :-)
-Piatato
on 16. February 2022, 02:53 by Willy Wonka
What a cool and classy puzzle! Very nice, loved every step!
—
I'm very happy to hear that! Thank you :-)
on 15. February 2022, 21:50 by marcmees
very nice. thanks.
—
Thanks! :-)
on 14. February 2022, 09:30 by henrypijames
Don't know what it is about this puzzle, but somehow I could immediately see pretty much *all* the consequences of the rules and the various constraints caused. One of the smoothest solves I've ever had, 3 stars difficulty.
—
Nice! I was a bit unsure how difficult it would be to notice all these things, and I am sure that it varies a lot from solver to solver. I am inclined to agree with 3/5, though, so I changed it, and hopefully we will soon enough see what people felt like on average. :-) Thanks for the solve and the comment!
-Piatato
on 14. February 2022, 05:52 by Playmaker6174
Absolutely marvellous and elegant puzzle! Every step was literally an aha moment to me, from that incredible opening to the major breakthrough in the mid solve ;)
—
Thanks a lot for the solve and the fantastic comment! I’m very happy that you enjoyed it so much! :-D
on 13. February 2022, 19:23 by Steven R
Great puzzle, thanks Piatato and Aaronymous!
—
Thanks for the solve and the comment! :-)
-Piatato
on 13. February 2022, 19:15 by filuta
Truly miraculous construction with a brilliant break-in. Well done!
—
Thanks for the very nice comment, and thanks a lot for the test solve! :-D
-Piatato
on 13. February 2022, 19:00 by Aaronomys
Wow!! You made an absolute masterpiece using this constraint! I loved this puzzle to bits; every deduction was an amazing joy to find. :D
—
Thanks a lot for the amazing comment, and thanks again for your marvelous ideas! :D
-Piatato
