Colorful Squares
(Published on 18. May 2026, 11:11 by Rab3aron)
Normal Sudoku rules apply.
German Whisper: Adjacent digits along a green line have a difference of at least 5.
Renban: Digits along a purple line form a set of consecutive digits in any order.
Parity Line: Along the red line, every pair of consecutive cells on the line must contain one odd digit and one even digit.
Nabner: Digits along a yellow line form a set of non-consecutive digits in any order.
Region Sum Line: Box borders divide a blue line into segments which have the same sum. Different lines may have different sums.
Modular Line: Any run of three sequential cells on a teal line must contain one digit from each of the sets {1,4,7}, {2,5,8}, and {3,6,9}.
Black Dots: Digits in cells joined by a black dot are in a 1:2 ratio.
Solution code: Row 4
Comments
on 19. May 2026, 05:06 by by81996672
Good puuzle.
Have some average newcomers flooded in? Recently, when I occasionally solve puzzles, I see some two- or three-star puzzles being rated as four-red-star .
on 18. May 2026, 17:24 by Snookerfan
Very nice! I am not sure why some call it very hard, because I did not experience any hard steps. My solve time fits a 2-3 star puzzle. Thanks
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Thank you snookerfan :) I agree with you regarding the difficulty
on 18. May 2026, 17:06 by Dr Logic
Loved the break in (both). Wonderful puzzle
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Thank you :)
on 18. May 2026, 17:00 by 6yler
Exquisite puzzle as always
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Thanks!
on 18. May 2026, 16:50 by Myfyr MJ
Very nice but very hard - 108 minutes to get through this one!
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Thank you glad that you liked it :)
on 18. May 2026, 16:50 by Douglass
Brilliant! A perfect 3* in my opinion :)
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Thank you :) I agree with the difficulty
on 18. May 2026, 15:51 by Rab3aron
Changed the difficulty to 4/5
on 18. May 2026, 15:43 by Ragna
Fun puzzle! But very hard. Thank you. :-)
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Thanks for the feedback, I changed it to a 4 star.
on 18. May 2026, 15:08 by Onkel_Dagobert
Brilliant, beautiful, and very hard.
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Thanks for the feedback, I changed it to a 4 star.
on 18. May 2026, 13:07 by Elliott810
Beautiful puzzle! Thank you:)
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Thanks for solving :)
