Killer Sudoku - Twirl
(Eingestellt am 6. Dezember 2020, 11:18 Uhr von Phistomefel)
Es gelten die üblichen Sudoku-Regeln. Ein Gebiet, das von einer gestrichelten Linie umrandet ist, wird auch Käfig genannt. Eine Zahl in der oberen linken Ecke eines Käfigs zeigt die Summe der Ziffern im Käfig an. In einem Käfig dürfen sich keine Ziffern wiederholen.
Das Rätsel ist auch online über F-Puzzles verfügbar. Viel Spaß beim Lösen!
Lösungscode: 5. Zeile und 5. Spalte
Kommentare
am 1. Februar 2025, 01:32 Uhr von TheNineElements
Solve Time: 37:29
I rated this 4/5 difficulty
Really nice killer Sudoku. The whole symmetry/geometry led to an early, wonderful deduction that restricted cells around the entire grid. It was a bit tricky to nail down, but I luckily spotted the major restriction(s) fairly early on, in part due to the title of the puzzle. I tried to color it at first, but that wasn't fruitful so I did a bit of experimentation that allowed me to determine polarity (and a bit more information as well, but I wont spoil it here) of the relevent cells and the rest of the puzzle came together nicely.
I think the break-in was probably 4-5/5 difficulty for a killer sudoku, the remainder of the puzzle was around 2-3/5 difficulty for me (still was NOT trivial). The initial major deduction wasn't too hard to spot (its location), but determining its implications was very tricky. Once I had an understanding of it after experimenting with some sums/values, it was very powerful and the rest of the puzzle was much more approachable.
Because the two phases of the solve had different difficulty levels (for me), I decided that 4/5 would be a fair assessment for the overall difficulty. This puzzle took me less time than is normal for 4* puzzles. This is likely because I was attempting to 'speedrun' the solve and I am also fairly experienced with killer puzzles so that did tilt my solve time to be a bit quicker. Even though my solve time wasn't very long (compared to many other 4-5/5 difficulty puzzles), the puzzle was definitely not easy, and the major restriction was very hard to formalize/notate.
Great puzzle & thanks for sharing!
am 12. Juli 2024, 16:13 Uhr von mezkur7
Sudokupad: https://sudokupad.app/golq795apl
am 2. Juni 2024, 04:59 Uhr von KNT
really good killer sudoku! the first digit(s) felt very nice to place.
am 11. Januar 2024, 17:18 Uhr von karlmortenlunna
Absolutely one of the nicest killer-puzzles I've done. Thanks!
am 26. März 2022, 19:53 Uhr von Playmaker6174
That was pure madness, but in a very good way.
After the fairly spot-on opening it's still not anywhere near easy and I had to keep track on every spot of the grid consistently, but the result was so rewarding and satisfying. A true hidden gem of its own! ;)
am 28. August 2021, 12:07 Uhr von William Cheese
Cool puzzle.
am 28. August 2021, 10:11 Uhr von Prutsbeest
To me, this was one of the hardest puzzles from Phistomefel. Glad I finally managed to solve it!
am 4. Februar 2021, 17:22 Uhr von DJdoku
This is outrageously good!
am 17. Januar 2021, 02:07 Uhr von DiMono
I was slow on my solve, but this is such a good puzzle. Thank you for constructing it.
@DiMono: Thanks a lot for solving it and for your kind words!
am 8. Dezember 2020, 17:04 Uhr von Phistomefel
@Willy Wonka, @SudokuExplorer, @BcVcB: Many thanks for your wonderful feedback! I think, I will have enough time over christmas to finally make a video on what I learned about setting puzzles.
am 8. Dezember 2020, 16:14 Uhr von BcVcB
This was insane! Hope you'll one day make a video of how you create these amazing sudokus.
am 8. Dezember 2020, 03:57 Uhr von SudokuExplorer
Wonderful!!! I loved the entry logic and how the logic flowed afterwards. This is without doubt one of the nicest killer sudokus I've ever solved. Thanks :-)
am 7. Dezember 2020, 09:52 Uhr von Willy Wonka
Incredible puzzle as always that flows very very nicely. A tough solve but rather achievable despite my limited solving abilities. One of my favourite killer sudokus!
am 6. Dezember 2020, 18:01 Uhr von Phistomefel
I am glad you enjoyed the puzzle, cdwg2000 and SirWoezel! :)
am 6. Dezember 2020, 14:58 Uhr von SirWoezel
Let’s see... 11.50 to 14.40... one toilet break, one sandwich, one (long) phonecall. I would say just under 2 hours and 30 minutes! Wonderfull puzzle!
Well chosen puzzle-name by the way!
am 6. Dezember 2020, 13:59 Uhr von cdwg2000
It is another wonderful problem. C1379 interacts well. Thank you very much for the ingenious ideas of the author! Looking forward to a more wonderful Christmas dinner:-)
