Logic Masters Deutschland e.V.

Hawaii (Spiral Galaxy Sudoku)

(Published on 5. February 2022, 15:04 by PjotrV)

Aloha!

Link to the puzzle (Hawaii):
f-puzzles: https://f-puzzles.com/?id=ycnf4aqc
CtC app: https://tinyurl.com/2k6f5fm4

- In each row and column the digits 1-9 must appear exactly once.
- Each cell is part of a galaxy. There are big galaxies of exactly 9 cells and island galaxies which are smaller than 9 cells. Digits can't repeat in galaxies.
- Each galaxy is 180 degrees rotational symmetric.
- In the center of each galaxy there is exactly one circle either between 2 cells or in a cell. A circle in a cell is odd and a circle between 2 cells is a consecutive pair. Some of the circles are given, the other circles must be explored.
- Island galaxies can't touch eachother, not even diagonally.
- Clues outside the grid sum the digits of the island galaxies in that row or column.



For illustration I made an example and provided the solution as well below.
Link of the example puzzle (Maui):
f-puzzles: https://f-puzzles.com/?id=yd72u477
CtC app: https://tinyurl.com/368xtmcm

Solution code: Column 2 and column 3

Last changed on on 5. February 2022, 17:26

Solved by grkles, JayForty, Steven R, Jesper, marcmees, Chilly, PulverizingPancake, MagnusJosefsson, Aspartagcus, LurkingFrog, abed hawila, Garford, Xenonetix, Angelo, PrimeWeasel, hurrdurr, Andrewsarchus, ... mathpesto, cdwg2000, thefallenrat, Lizzy01, Vebby, dogfarts, michaal94, Uhu, KNT, peacherwu2, twobear, Kafkapharnaum, qoala, SirJefferE, Tom-dz, pkp, polar, Wooden_Picks, shadow-nexus, lpq29743
Full list

Comments

on 18. December 2022, 01:19 by peacherwu2
Very well designed. Thank you so much!

on 18. December 2022, 01:18 by peacherwu2
Very well designed. Thank you so much!

on 11. April 2022, 11:58 by Vebby
Brilliant puzzle! Both phases of the solve were a lot of fun. Thanks Peter! :)

on 15. March 2022, 01:59 by mathpesto
What a wonderfully challenging puzzle and such a clever ruleset!

on 8. March 2022, 20:45 by OGRussHood
Solved in a little over one hour. I just love chaos construction puzzles, and combining it with galaxy rules was a nice twist.

on 8. March 2022, 05:34 by Elliptical
Very good puzzle. Started reasonably easy and got steadily harder.

on 8. March 2022, 00:23 by colski
Lovely puzzle, extremely hard but very logical!
One note: without the 7x7 example I would not have understood that every circle is at the center of a galaxy. I suggest: "There is exactly one circle in each galaxy, and it is always at the center. Not all circles are given."

Last changed on 13. February 2022, 18:24

on 13. February 2022, 10:35 by Phistomefel
Challenging and beautiful puzzle! Thank you, PjotrV!

PV: Thanks a lot! :)

Last changed on 13. February 2022, 18:24

on 11. February 2022, 13:39 by Andrewsarchus
Very Nice!

PV: Thanks a lot! :)

Last changed on 10. February 2022, 16:23

on 10. February 2022, 13:15 by PrimeWeasel
It really helped that I set a monster Spiral Galaxy myself once to get through this one (which still doesn't have a rating by the way). Really well designed Peter!

PV: Thanks a lot! :)

Last changed on 9. February 2022, 22:20

on 9. February 2022, 20:24 by Angelo
Really nice! I am amazed that you have found a puzzle like this that had a unique solution and was pretty approachable as well.

PV: Thanks a lot! :)

Last changed on 9. February 2022, 19:51

on 9. February 2022, 18:50 by Garford
It was a good idea to try the small one first. :D Very well done, PjotrV!

PV: Thanks a lot! :)

Last changed on 9. February 2022, 19:50

on 9. February 2022, 00:09 by abed hawila
Wow! brutal but rewarding!

PV: Thanks a lot! :)

Last changed on 7. February 2022, 12:46

on 7. February 2022, 00:23 by Aspartagcus
That was quite a ride! Such a narrow, and brilliantly set solve path. Enjoyed it a lot!

PV: Thanks a lot! :)

Last changed on 7. February 2022, 12:46

on 6. February 2022, 23:55 by MagnusJosefsson
Great puzzle! Challenging and interesting!

PV: Thanks a lot! :)

Last changed on 6. February 2022, 22:28

on 6. February 2022, 00:11 by Chilly
Great puzzle Peter - the Sudoku was harder than the galaxies :)

PV: Thanks a lot! :)

Last changed on 6. February 2022, 22:28

on 5. February 2022, 23:11 by marcmees
great puzzle. thanks.

PV: Thanks a lot! :)

Last changed on 6. February 2022, 22:28

on 5. February 2022, 21:24 by Jesper
Very nice, thanks!

PV: Thanks a lot! :)

Last changed on 5. February 2022, 19:22

on 5. February 2022, 18:37 by henrypijames
Is every galaxy less than 9 cells large an "island galaxy"?

PV: yes :)
in the example puzzle it is of course less than 7 cells :)

on 5. February 2022, 17:26 by PjotrV
solution code glitch

Last changed on 6. February 2022, 22:28

on 5. February 2022, 17:15 by JayForty
Very nice puzzle! Really like the ruleset and what you did with it and the solve was really smooth.

PV: Thanks a lot! :)

Last changed on 6. February 2022, 22:27

on 5. February 2022, 17:06 by grkles
Wow... that was incredibly difficult but extremely rewarding!

PV: Thanks a lot! :)

Difficulty:5
Rating:97 %
Solved:57 times
Observed:5 times
ID:00091U

Puzzle combination Latin Square

Enter solution

Solution code:

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