Nurimisaki Whispers 9x9
(Published on 7. June 2024, 19:46 by JustinTucker)
- The digits 1 to 9 appear once in every row, column and box.
- Shade some cells such that the remaining unshaded cells form one orthogonally connected area and no 2x2 area of cells in the grid is completely shaded or unshaded.
- Circles mark every instance of a cell which is unshaded and orthogonally adjacent to exactly one other unshaded cell.
- The number in a circle indicates how many cells are in the straight line of unshaded cells coming out of the cell with the circle, including itself.
- Orthogonally adjacent unshaded cells have a difference of at least 5.
Solution code: Row 5
Comments
on 14. November 2024, 14:06 by hepcecob
@JustinTucker
Sorry, I didn't see your first post.
Yes, your solution is fine so far.
Concerning the other question. I know that a lot of people around here differentiate between "logical steps" and bifurcation. I don't see a clear difference. If I have two options and option 1 implies proposition 1 which in turn implies proposition 2 which contradicts something in the puzzle and therefore the result is option 2, is this a logical step or bifurcation? I have no problem with the reductio ad absurdum and the law of excluded middle. But others have, I know. I just wanted to prove uniqueness for a 9x9 without a given.
on 26. August 2024, 15:09 by CHalb
Ok, my first attempt was very interesting, second try will follow. :)
on 9. June 2024, 19:25 by uvo
I haven't solved it (and I have no intention to), but when the first sentence in the puzzle rules literally is the Sudoku rules, it is hard to argue that it isn't a Sudoku.
on 9. June 2024, 19:20 by JustinTucker
Shifting the puzzle from "No Sudokus" to "Sudokus" doesn't reflect its essence. There's no need for that.
on 9. June 2024, 18:57 by uvo_mod
Sudoku tag added.
on 8. June 2024, 11:05 by h5663454
Brutal
