Quad-tenburg
(Published on 9. June 2024, 11:25 by sujoyku)
- Normal sudoku rules apply, i.e. each row, column and 3x3 region has to contain the digits from 1 to 9 once each.
- Quadruple: A digit in a circle must appear in one of the four surrounding cells.
- Battenburg: Whenever 2 odd and 2 even digits form a 2x2 checkerboard pattern (e.g. R1C1 and R2C2 even, R1C2 and R2C1 odd), a Battenburg marking is given. If there is no such marking, the above pattern is not allowed.
Clarification: Also quadruples may only form an odd/even-checkerboard if there is an underlying Battenburg marking.
Here you can solve the puzzle online:
Solution code: Column 1 from top to bottom (9 digits in total)
Comments
on 29. July 2024, 17:17 by Crusader175
Fun coloring!
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Thank you for commenting and featuring the puzzle on your Youtube channel, Crusader175! I am glad you had a fun colouring experience.
Kind regards, sujoyku
on 29. June 2024, 18:42 by Lenivaya_Joppa
Thank you for this interesting puzzle, dear sujoyku! I really enjoyed solving it. :)
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Thank you for your comment, Lenivaya_Joppa! I am glad that you have enjoyed the solve.
Kind regards, sujoyku
on 15. June 2024, 01:21 by m_and_m_toastie
I've not played many puzzles with the battenburg ruleset, and while I found this fun I also found it very difficult. Just over 50 minutes, not including a long break. Enjoyed it very much though! Neat mix of rules and, when I finally found it, cool logic
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Thank you for your comment, m_and_m_toastie! I am glad that you enjoyed the puzzle. You are right, the Battenburg constraint is not that common at the moment. If you like it, you might check out some of my other puzzles in this variant. I also highly recommend "Bad Thermburg" by Qodec and "Mountain Snow" by CaptZebraCakes.
Kind regards, sujoyku
on 13. June 2024, 21:16 by meatbox
Loved the interactions between the two constraints ❤️
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Thank you for your comment, meatbox! I am glad that you liked the combination of the quadruple and Battenburg ruleset.
Kind regards, sujoyku
on 11. June 2024, 15:46 by Lion Crow
That was fun. Thankyou.
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You are much welcome, Lion Crow, thank you for commenting! It is nice to hear you had a fun solve.
Kind regards, sujoyku
on 11. June 2024, 04:58 by speedyjohn
Lovely puzzle. I found it quite tricky (but I’m by no means a pro), but not frustrating. Made it all the more rewarding to finally get it.
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Thank you for your comment, speedyjohn! I am glad that you liked the puzzle and found the solve to be rewarding.
Kind regards, sujoyku
on 10. June 2024, 21:47 by emsou
I wouldn't say this is 1.5 stars at all. To me it felt like a hard 2 or even a soft 3.
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Thank you for your comment, emsou! Maybe I erred a little on the easier side. Although in my defense, I like to argue that the difficulty depends on the familiarity with the Battenburg constraint. :)
But be that as it may, thank you for sharing your opinion.
Kind regards, sujoyku
on 10. June 2024, 10:08 by sujoyku
added a clarification to the rules in reaction to a question by asp1310, no changes to the contents of the puzzle
on 10. June 2024, 02:34 by asp1310
Can quadruples be battenburgs?
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Quadruples only may be Battenburgs if they also have an underlying Battenburg symbol. Maybe I should have emphasized that in the wording of the rules. Thank you for posing this question and thereby clarifying the matter, asp1310!
Kind regards, sujoyku
on 9. June 2024, 18:04 by LeaVulpina
Your username is especially appropriate for this puzzle, because this was an absolute delight of a puzzle.
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Thank you for those kind words, LeaVulpina! I am glad that you enjoyed solving the puzzle.
Kind regards, sujoyku
on 9. June 2024, 17:22 by Prince Joffrey
Beautiful combination of constraints
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Thank you for your comment, Prince Joffrey! I am glad that you liked the combination of constraints.
Kind regards, sujoyku
on 9. June 2024, 15:20 by Virux
Such a lovely puzzle! Great job on the setting!
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Thank you for the comment, Virux! I am glad that you enjoyed the puzzle.
Kind regards, sujoyku
on 9. June 2024, 12:16 by fuxia
Very nice and smooth. Thank you!
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You are much welcome, fuxia, thank you for commenting! It is nice to hear you had a smooth solve.
Kind regards, sujoyku
on 9. June 2024, 11:42 by Enkerro
Absolutely loved it!
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Thank you for the comment, Enkerro! I am glad you liked the puzzle.
Kind regards, sujoyku
