Star Battle Sandwich
(Published on 10. July 2020, 10:06 by Kweston)
Hybrid Star Battle and Sandwich sudoku
Standard sudoku rules apply, in addition:
4's and 6's act as stars from Starbattles, that is that each 4 and 6 cannot touch either a 4 or 6, even diagonally.
For each pair of edge clues, one clue denotes how many cells away the nearest star in that row/column is from the cell containing the clue
The other clue denotes the sum of the digits sandwiched between the two stars in that row/column
Solution code: 7th row followed by final column, no spaces
Comments
on 27. February 2023, 19:56 by zrbakhtiar
https://f-puzzles.com/?id=2pup29gn
on 10. July 2020, 23:11 by henrypijames
Another thing: The constraint that 4 and 6 cannot touch isn't needed (in fact I totally forget about it) to place all 4s and 6s in this puzzle.
on 10. July 2020, 21:28 by Kweston
Thank you everyone for the feedback and the lessons, puzzle is fixed in a very simple way. It now has a unique solution
on 10. July 2020, 20:36 by henrypijames
@Kweston: You can only use uniqueness techniques if you know the puzzle has an unique solution - which in this case is not true. So your method - proving it's unique by assuming it's unique - is a false tautology (akin to a self-fulfillng prophecy).
In other words, uniqueness techniques are only for solvers - setters are forbidden to use them. :)
on 10. July 2020, 16:47 by Greg
same, 3 solutions.
on 10. July 2020, 14:24 by henrypijames
I think I've found three different valid solutions.
