Rundweg Sudoku Twins
(Published on 1. October 2010, 18:39 by pokerke)
The twins look identical but if you get to know them better then you will find out they are quite different. Both follow the traditional Rundweg rules (8x8 grid, with the given digits), further they are also both 4x4 Sudokus (in the large cells containing 4 Rundweg cells each) with the numbers 1 to 4 in every row, column and quadrant of the puzzle.
For the first twin, the sudoku numbers are equal to how many of the 4 rundweg cells are INSIDE the Rundweg.
For the second twin, the sudoku numbers are equal to how many of the 4 rundweg cells are OUTSIDE the Rundweg.
Solution code: The size of the areas outside each rundweg, clockwise starting in the top left. First for the first twin, then for the second.
Comments
on 4. September 2023, 11:05 by filuta
I found the inside one way harder than the outside one, cool idea - penpa+ link http://tinyurl.com/2by2zaa6 (answer check on digits in the bottom grids and edges in the top grids)
on 12. July 2020, 21:21 by szabog
I love this idea and congratulation for creating two identical grids, with two different unique solutions forced with such an elegant rule difference - this is a masterpiece. I love that you always make a story for your puzzles, too. I am so sorry that you stopped creating puzzles :(
on 14. March 2020, 18:56 by Lucx
Der erste Zwilling ist ja deutlich schwieriger. Eine sehr schöne Idee, diese Rätsel ineinander zu verketten. vielen Dank!
on 13. November 2011, 22:12 by kiwijam
I found the first twin here the hardest of all the family members in the series...
on 8. May 2011, 13:08 by rob
Sehr schön. Die Varianten unterscheiden sich deutlich mehr, als die symmetrische Beschreibung vermuten lässt.
on 30. October 2010, 05:57 by Richard
Brilliant puzzle! Daughter one gave much more problems as her sister...
on 16. October 2010, 13:09 by pin7guin
Absolut genial! Haben diese Zwillinge auch noch Geschwister? :)
on 14. October 2010, 21:00 by CHalb
Good idea and very well done.
on 12. October 2010, 10:07 by CHalb
It's a great puzzle. I'm half way through. But I had a big problem in understanding the rules. Not because of the text but because of the diagram. The four sudokuareas should be marked with thicker lines.
@CHalb: Fixed. I didn't mark them before since they are not really necessary, the solution is unique even without them.
on 5. October 2010, 11:51 by pokerke
I actually had some help with a translation yesterday that I still had to put online. Now the German text is also there.
on 5. October 2010, 11:21 by flaemmchen
Ist jemand so freundlich und erklärt mir die Anleitung auf Deutsch? Das mit den Sudokuzahlen habe ich nicht verstanden :-((
Vielen Dank!
on 4. October 2010, 10:49 by Luigi
Das war eine knifflige, aber schöne Herausforderung!
on 2. October 2010, 18:22 by Mody
Really great :)
on 2. October 2010, 17:02 by ibag
Great construction! Thank you!
on 2. October 2010, 11:39 by Alex
nice new idea and tricky!
on 2. October 2010, 11:38 by pokerke
It would be nice to make a bigger version of this puzzle (not necessarily a twin), maybe even a full 9x9 Sudoku, which would be a 27x27 Rundweg.
I haven't patented the idea so anyone is of course free to make as many as they want ;-).
on 1. October 2010, 21:06 by SilBer
I liked it very much!! LG Silke
on 1. October 2010, 19:39 by Statistica
Wow! Wonderful idea!
