Undercover
(Published on 17. May 2025, 05:30 by NicoD)
Rules
Normal sudoku rules apply.
Along pink lines, digits form a consecutive sequence in any order.
Along green lines, adjacent digits differ by at least 5.
Pink lines are in the background: they might extend under the green lines.
Two lines entering the same cell must be connected.
The black dot joins cells with a 1:2 ratio.
Solution code: Row 1
Comments
on 23. May 2025, 20:46 by oskode
Really fun and cool! Don’t understand the low rating at all. I think turning the (often) bad design of overlapping lines into a gimmick was clever
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ND: Thank you very much, glad you enjoyed!
on 23. May 2025, 15:17 by emirben
Can renban lines have more than 9 numbers in sequence, for example 1234567891 ?
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ND: No, maximum size for a renban is 9 cells, as usual.
on 18. May 2025, 08:13 by Yaoning
The smooth solving path deserves a higher rating.It will be clearer to highlight the rule that gives the difference with normal renben line.
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ND: Thanks for solving!
on 17. May 2025, 22:33 by NRB
I don’t understand the significance of the phrase ‘ Two lines entering the same cell must be connected‘
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ND: Hello.
It is just to state that there is no "trick" where there could be a small gap (behind a green line) between two pink lines in the same cell.
on 17. May 2025, 20:56 by jwsinclair
Very tricky (at least for me), but it's a cool idea, and really nicely constructed
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ND: Thanks James, it means a lot!
Another one on this theme coming tomorrow.
on 17. May 2025, 20:27 by Snookerfan
Great puzzle, incredibly hard for me though. So much to keep track of, but I enjoy a challenge. Thank you!
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ND: You are welcome, good job on solving it!
on 17. May 2025, 18:51 by TJ
Are the pink lines allowed to branch?
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ND: Yes.
on 17. May 2025, 12:08 by Gambit
The puzzle seems broken to me with the pink renban line in box 2. Or am I missing something in the rule set?
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ND: Yes you probably are!
"Pink lines are in the background: they might extend under the green lines."
on 17. May 2025, 08:34 by keenbowl
The pink lines are in the background rule seems to be essential for anyone else who thinks this is broken :)
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ND: Indeed it is!
