Olympic rings
(Published on 30. September 2025, 05:30 by NicoD)
Rules
Normal sudoku rules apply.
Cells separated by a king's move cannot contain the same digit.
Box borders divide the blue ring (region sum line) into segments with the same sum.
Along the green ring (german whisper), adjacent digits differ by at least 5.
Along the yellow ring (dutch whisper), adjacent digits differ by at least 4.
Digits along the red ring (parity) must alternate between odd and even.
Digits along the black ring (thermometer) increase from the bulb (r5c7).
Solution code: Column 9
Comments
on 1. October 2025, 18:33 by PinkNickels
Another banger from Nico! Thanks for the usual fun solve!
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ND: Glad you enjoyed!
on 30. September 2025, 17:20 by superkinkel
Very nice one, but difficulty wise, I reckon two stars would be more adequate - at least in comparison to a bunch of two star puzzles that I would rate harder.
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ND: Thank you for the feedback!
on 30. September 2025, 17:18 by BorisTheSnake
Very nice!
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ND: Thanks!
on 30. September 2025, 15:56 by Exigus
Interesting interactions around box 1. Very nice looking puzzle. Thanks!
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ND: Thank you very much!
on 30. September 2025, 15:07 by Snookerfan
Lovely puzzle with some tricky and surprising steps. Thank you!
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ND: Thank you for solving!
