Five & Friends Gone Fishing
(Published on 10. February 2023, 19:34 by Nebuzaradan)
Each digit 1-9 appears at most once in each row, column, and box. Three of those digits (including the digit 5) do not appear in the puzzle at all.
Cells separated by a black circle contain digits in a ratio of EITHER 1:2 OR 1:3. All possible black circles are given.
Grey lines indicate palindromes, and normal little killer rules apply.
I first submitted this puzzle to zetamath's fiveless challenge.
Solution code: Last row, left to right
Comments
on 27. September 2025, 00:06 by ViKingPrime
I would definitely say this is a bit on the tricky side, despite all the clues. If you're careful though you'll have no issue navigating through. Great puzzle.
on 2. July 2024, 18:16 by Nebuzaradan
estimated difficulty revision
on 6. July 2023, 15:18 by MartinR
Nice little puzzle - I'm a fan of ones with negative constraints.
I didn't see any issue with the lk as others noted, I found it made the disambiguation quick at the end (I coloured first)
on 12. February 2023, 03:25 by Nebuzaradan
mrgadget, AstralSky, thank you both for trying the puzzle! I double-checked: the puzzle is not broken, and the LK clue is indeed necessary. (This also matches what zetamath found when streaming it.)
on 10. February 2023, 19:47 by AstralSky
And yeah..Puzzle is fine without the LK, but broken with the LK.
on 10. February 2023, 19:45 by AstralSky
Wait there is a LK clue?
I solved without using the LK clue...XD
on 10. February 2023, 19:43 by mrgadget
The little killer clue is impossible.
