No "O" in Adder
(Published on 25. April 2022, 02:51 by Scruffamudda)
Normal sudoku rules apply.
Additionally the solver must find a single snake of orthogonally connected digits beginning at the given 1. The snake does not touch itself (even diagonally), does not touch any white dots, but must visit each 3x3 box in the grid.
Each digit on the snake is the sum of the previous two digits modulo 10 (eg 5+7=2).
Grey digits are not on the snake but show the number of snake cells in the surrounding (up to) eight cells.
Digits separated by a white dot are consecutive. Not all dots are given.
Solution code: row 8
Comments
on 9. May 2022, 21:24 by Klausku
What a beautiful puzzle. Took me a while to figure out the snake‘s composition. But I really enjoyed the solve.
on 27. April 2022, 10:49 by Sartograph
After initially ruling out several options this solves in a really nice flow then. Liked it a lot!
on 26. April 2022, 23:26 by Bankey
The rule about "each" digit on the snake being the sum (modulo 10) of the previous two digits needs to be clarified as it cannot apply to the second digit which only has one previous digit i.e. the given 1.
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Yes, I had realised that. I think the solver will realise without this clarification that any digit may appear as the second digit.
- Scruffamudda
on 26. April 2022, 18:22 by drbs
Very nice puzzle! Once you understand the logic of the snake, it solves itself.
on 25. April 2022, 19:47 by SHERAX
Feels Like An Adder Bit Me After I Was Done With This One….It Solves But Very Painfully. How You Come Up With This Venomous Puzzle….
on 25. April 2022, 18:39 by davidjshort
At first, I made too many wrong assumptions about the properties of the snake only to figure out the delicate nuance of the modulo constraint. I thoroughly enjoyed this puzzle.
on 25. April 2022, 11:19 by m0rkoli
I would have just quit this puzzle, without Scatterbrains couraging words! ;)
on 25. April 2022, 08:33 by ScatterBrain
This was quite the challenge! Of course once you figure out the second number on the snake you know the order of all the snake numbers. Don't give up!
