Pairing Order and Chaos
(Published on 26. July 2026, 15:59 by sujoyku)
Rules:
- Chaos Construction: Divide the grid into seven orthogonally connected seven-cell regions, and place the digits 1-7 once in each row, column, and region.
- Parity Sums: A clue outside the grid gives the sum of all continuously adjacent digits that are alternating in parity up to (and not including) the first digit that repeats parity.
Moreover, for each clue the digits contributing to its sum must belong to the same region and the fist parity-repeating digit must belong to a different region.
Example: The row 1235467 would have a sum clue of 6=1+2+3 from the left (3 and 5 are both odd) and a sum clue of 13=6+7 from the right (4 and 6 are both even).
- Region Counters: A digit in a square counts how many different regions intersect the indicated row or column (i.e. how many region have at least one cell contained in that row or column).
Here you can solve the puzzle online:
Solution code: Row 4 from left to right with the symbol "/" marking borders between regions (for example 12/345/67)
Comments
on 11. August 2026, 18:32 by yuripuppies
A little bit harder than the previous one, but still very fun and surprisingly constrained
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Thank you for your comment, yuripuppies! It is good to hear that you liked the puzzle.
Kind regards, sujoyku
on 11. August 2026, 14:09 by Grecolons
It was an enjoyable journey. With a little help from the Sujoyku I was able to solve it.
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Thank you for your comment, Grecolons! I am glad that you enjoyed the puzzle.
Kind regards, sujoyku
on 8. August 2026, 03:23 by PancakePie
Beautiful and fun! The chaos at the end had me scratching my head, but it was a joy to solve. Thank you!
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You are much welcome, PancakePie, thank you for your comment! I am glad that you enjoyed the solve.
Kind regards, sujoyku
on 6. August 2026, 15:11 by ScatterBrain
This was not easy! I can't imagine how you set this puzzle. But after quite a while I powered through. Thanks!
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You are much welcome, ScatterBrain, thank you for your comment! I am glad that you liked it. This took me quite a while to set (I first tried without the region counters) and I got to notice how lucky I had been when setting my first CC. :)
Kind regards, sujoyku
on 4. August 2026, 23:12 by BrianO
I liked the start - the parity sums are a very nice ruleset and they flowed great. I hit a wall near the end with the giant deadly pattern where it was no longer clear how to proceed - sadly ended up just bifurcating.
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Thank you for your feedback, BrianO! I am glad that you enjoyed the start and sorry to hear that you could not enjoy the ending as much. If you like to see some of my intended steps, let me know in a hidden comment or feel free to reach out to me via discord.
Kind regards, sujoyku
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Thanks! I went back and stared some more, especially after seeing what failed on the wrong bifurcation path, and think I saw the question I should have asked. I just struggled to identify that question, given how many cells were still unresolved. I really enjoyed the ruleset, though! Cheers!
on 30. July 2026, 04:27 by rachiya
Such a fun solve!! Really beautifully constructed.
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Thank you for your comment, rachiya! I am glad that you had a fun solve.
Kind regards, sujoyku
on 29. July 2026, 15:08 by Lenivaya_Joppa
Thank you for this nice puzzle, dear sujoyku! :)
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You are much welcome, Lenivaya_Joppa, thank you for your comment! I am glad that you enjoyed the puzzle.
Kind regards, sujoyku
on 28. July 2026, 17:35 by Sherif
Nice one, 2.5 - 3 to me
**
Thank you, Sherif!
Kind regards, sujoyku
on 27. July 2026, 08:37 by Snookerfan
Very nice, I loved the R4C5 clue. Thanks!
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Thank you for your comment, Snookerfan! It is great to hear that you liked the puzzle. Fun fact: R4C5 was the last clue I added when setting the puzzle. I am glad you enjoyed this finish.
Kind regards, sujoyku
on 27. July 2026, 04:21 by lootyloot
Very smooth and fun. I love you sujoyku!
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Thank you for your kind words, lootyloot! I am glad that you had a smooth solve.
Kind regards, sujoyku
on 27. July 2026, 03:32 by RedBarchetta
Superb!
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Thank you, RedBarchetta!
Kind regards, sujoyku
on 26. July 2026, 23:34 by sujoyku
Thank you for your kind comments, @Chaka, @damo_89, @Christounet and @SennyK! It is great to hear that you liked this variant.
Kind regards, sujoyku
on 26. July 2026, 23:27 by SennyK
Another great CC, good job! :-)
on 26. July 2026, 22:55 by Christounet
Enjoyed the rulesets. Thanks :)
on 26. July 2026, 22:23 by damo_89
Sehr gut. Vielen dank.
on 26. July 2026, 21:23 by Chaka
That was fun! I really liked the parity sum idea and when there is CC on board of a good puzzle I usually tend to be amazed. Thanks a lot for creating and sharing, Sujoyku!
on 26. July 2026, 19:12 by marcmees
very nice. Fun solve. Thanks
**
Thank you, marcmees!
Kind regards, sujoyku
on 26. July 2026, 17:51 by amirs
Very clever construction. Resolving all the parity sums was really fun and smooth. The region counters were a bit trickier and made it a 3* for me.
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Thank you for your comment, amirs! I am glad that you enjoyed the puzzle. Also thanks for sharing your take on difficulty.
Kind regards, sujoyku
on 26. July 2026, 17:13 by wuc
And another beautiful 7x7 cc. Thx for all those great puzzles. 2.5* to me. Awesome thx.
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Thank you for your feedback, wuc! I am glad that you liked it.
Kind regards, sujoyku
