Black-dot Mamba
(Published on 10. November 2023, 20:55 by yttrio)
Rules:
Normal Sudoku rules apply.
Cells separated by a white dot are consecutive. Cells separated by a black dot have a 2:1 ratio. Not all possible dots are necessarily given.
Construct a one-cell-wide snake in the grid of orthogonally connected cells whose endpoints are given by the diamonds. The snake cannot branch and cannot touch itself, not even diagonally.
-- Every cell on the snake must have a 2:1 ratio with at least one other orthogonally adjacent cell that is also on the snake.
-- Orthogonally adjacent cells are allowed to have a 2:1 ratio if and only if both cells are on the snake.
6x6 Example:
The image below shows a sample 6x6 puzzle and solution with the same rule set.
Play the example 6x6 in SudokuPad.
Solution code: Column 7
Comments
on 6. April 2025, 13:28 by wuc
Masterpiece 4* puzzle. Awesome work again yttrio.
on 4. April 2025, 18:24 by Titus Adduxas
I really enjoyed that one, though I am partial to snake puzzles. Some really lovely logic throughout, and a nice bit of colouring at the end to disambiguate the primes. Given my completion time I’d probably grade it 3 stars as I hardly ever manage to do 4 star puzzles in under a hour. It’s a lovely puzzle though. Thanks Yttrio.
on 19. January 2024, 17:59 by sacklunch
Beautiful puzzle! Tough but very doable and extremely satisfying. Thanks for setting and sharing!
on 12. November 2023, 22:26 by TheRiddler
Very cool!
Challenging, but I could continually make progress and therefore never felt stuck or frustrated!
on 12. November 2023, 03:58 by mathpesto
What a fun ruleset!
on 11. November 2023, 21:45 by BenTen
Great puzzle! Really enjoyed this one. Thanks yttrio.
on 11. November 2023, 14:17 by Myxo
Very nice puzzle!
on 11. November 2023, 09:39 by Fizz
Very fun puzzle and engaging all the way through the end. Thanks!
on 11. November 2023, 02:59 by Nordy
Fantastic puzzle! Really enjoyed how the negative constraint worked in this
on 11. November 2023, 00:39 by Bankey
Fun puzzle. Thanks, @ yttrio :).
