Anti Anti (Sudoku)
(Published on 4. December 2021, 17:18 by PDN777)
Normal sudoku rules apply. Cells which are a chess knight's move apart may not contain the same digit. Cells which are a chess king's move apart may not contain the same digit. Digits in a cage must sum to the little number in the upper left, and may not repeat in the cage. // I think this puzzle is two stars for difficulty if you are new to "anti" rules. One star if you have some practice with these rules. As always, comments are welcome!
Solution code: First row of puzzle, and fourth column of puzzle (read top to bottom). Enter as a string of 18 digits, no spaces.
Comments
on 19. February 2022, 19:42 by haligonian
I was stumped until I remembered how helpful colouring could be. Great puzzle!
** Nice. I hadn't thought of coloring - glad it worked for you. :-)
on 16. January 2022, 20:36 by Hecspeed
Loved and thoroughly enjoyed how the double anti constraints worked together
** Agreed! I'm always amazed at how powerful they are together. :-)
on 30. December 2021, 22:52 by Shearing
Pretty difficult puzzle actually. I enjoyed solving it. Many thanks for sharing it!
** Yup - these constraints together are quite tricky. Stay tuned -- tomorrow I am publishing another puzzle quite similar to this! :-)
on 8. December 2021, 01:39 by PDN777
Thanks to the recent commenters! Yes the puzzle is rated at 2 stars now. It certainly takes some thought to find the break in.... I was amazed at how powerful the two anti constraints are together. Thanks for the feedback and solves!
on 7. December 2021, 18:11 by elpadrinoIV
Had to use some colouring to break in, after that it went smooth. Nice puzzle, at least 2 stars for me.
Thank you for the puzzle!
on 6. December 2021, 03:52 by KyleBaran
Despite having a good amount of experience with the rules, I still ended up taking 20 minutes just to find the break in. The logic went well enough, though. 2 stars for me!
on 5. December 2021, 22:24 by TheCaretaker
First time doing this rule set. Once I had the hang of how cells interacted, it became a very elegant puzzle. 2 stars for me
on 5. December 2021, 15:59 by PDN777
Thanks everyone for the comments! Well -- there seems to be a lot of 2 star energy! :-) Alas, there seems to be a silent majority out there, because the website is showing 1 star at the moment. :-( In any event, I hope the puzzle was enjoyable! Thanks for the solves.
on 5. December 2021, 15:04 by matiasv5
I agree with the previous comments: 2 stars for me. Nice puzzle!
on 5. December 2021, 14:17 by zembrost
nice puzzle, felt like a two star puzzle tho!
on 5. December 2021, 10:46 by KyleBaran
Despite having experience, it took me a good 20 minutes to figure out the break in
on 4. December 2021, 23:30 by gamlesvarten
Fun puzzle! I've done quite a few anti-puzzles and would classify this as a two-star :)
on 4. December 2021, 21:45 by wentel21
Thank you! very nice puzzle<3 But definitly a 2 star puzzle even if you are not new in anti rules.
on 4. December 2021, 21:30 by jimblek
The break-in was quite tricky for me. After that everything went smoothly. Excellent one. Thanks!
