Halligen
(Published on 8. January 2023, 07:48 by KNT)
Ships are to be placed in some water cells. If a number is in a water cell, it is a lighthouse, which indicates the total number of ships that share a row or column with that lighthouse. Ships may not touch each other, or lighthouses, even diagonally. Lighthouses may only touch other lighthouses diagonally.
SudokuPad
Solution code: Row 6, S for ship, L for island cell, and W for water cell.
Comments
on 5. March 2025, 16:17 by tuace
@polar: Time will show ;))
on 4. March 2025, 18:31 by polar
Or a classic tuace crypto series ;)
Welcome back!
on 4. March 2025, 17:51 by KNT
@tuace: seeing your name here was a very, very welcome surprise :)
I'm very excited to see a new Halligen puzzle from you, if you decide to make one!
on 4. March 2025, 11:57 by tuace
After far too long a break, I am finally returning to this wonderful portal, and it gives me great pleasure to do so with a Halligen puzzle. Thank you so much for taking up my old idea - I had always hoped that someone would do this. And I've also got a great desire to construct one again ;)
on 13. November 2024, 08:44 by udukos
Lovely puzzle
on 26. September 2024, 08:52 by ibag
Great - as usual! ;-)
on 1. February 2023, 02:55 by wooferzfg
Great puzzle, thank you. The scanning is definitely tough, but the lighthouse logic was really satisfying to figure out.
on 14. January 2023, 16:01 by cmb
Nice one.
on 14. January 2023, 07:03 by Agent
Very nice! I didn't know about the lighthouse ruleset, thanks for this discovery.
on 10. January 2023, 01:29 by Phistomefel
That was awesome! It wasn't so easy for me, but a very enjoyable solve. Thank you for constructing this beauty, KNT!
Out of curiosity: Are you planning on publishing Halligen variants, as well? :)
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Glad you enjoyed it :)
To answer your question: No, it wasn’t really my intention, as this puzzle was initially going to be a 10x10 example for the “real” one, which I hope is a fitting tribute to the original Halligen puzzles. The follow up is also fairly vanilla, none of that diagonal loop insanity, but it *does* have one complication that this doesn’t have, which should prove to make it more interesting. However, if people do manage to solve it and really enjoy it, I definitely would make more, and could probably come up with some interesting variations. It was particularly fun to set for me!
Also, theres a shame there are so few of these to solve. Maybe some others can provide a few more for me? ;-)
on 9. January 2023, 17:39 by MagnusJosefsson
Very nice original ruleset, I imagine the next one could be quite challenging indeed!
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I'm glad you enjoyed it, Magnus! And yes, the follow up is definitely challenging :). This was initially going to be the example puzzle (10x10), but I decided to extend the width and separate them. Also, this ruleset has been used by tuace 5 times in the past (can see under Lighthouses tag), and the second, or really main puzzle, is a tribute to his series, which is absolutely incredible and I recommend hugely.
on 8. January 2023, 07:51 by wisty
This puzzle is beautiful! Really elegant use of an elegant ruleset. A good variety of deductions make use of different aspects of the puzzle so it feels refreshing and holds your interest even if you're like me and get stuck sometimes!
