Masyu Loop Sudoku
(Published on 10. November 2020, 09:49 by Jesper)
- Normal Sudoku rules apply
- In addition, a loop needs to be drawn into the grid, obeying the rules of Masyu, when all 1's are considered as white pearls and all 2's are considered as black pearls
- Clues outside the grid indicate the sum of digits in loop cells in the respective row or column
Detailed rules for the Masyu loop:
- Must be a single closed loop, consisting of vertical and horizontal segments, passing through the center of cells
- Must never branch off or cross itself
- Must visit all 1's and 2's
- Must continue straight when passing through a cell with a 1, but turn in at least one of the adjacent cells along the loop
- Must turn when visiting a cell with a 2, but go straight through both adjacent cells along the loop
Example:
The puzzle follows:
Penpa: Masyu Loop Sudoku
SudokuPad: Masyu Loop Sudoku
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Solution code: row 8 followed by column 5 (18 digits, no spaces or commas)
Comments
on 2. January 2024, 04:32 by dumediat
Fantastic puzzle! I loved the variety of deductions available, thank you very much!
on 29. August 2023, 16:02 by StephenR
Most enjoyable, thanks. Don't think I've ever done a Masyu Sudoku before so kudos for coming up with an original variation. I am usually slow to spot logic at the start, but once I had made some progress I found it flowed much more smoothly.
on 10. April 2023, 23:56 by Piatato
Awesome puzzle, thanks!
on 10. April 2023, 19:56 by Paquet Voleur
I came here following a recommendation from Christounet, and found a very well designed puzzle that's both challenging and rewarding. Thanks for setting and sharing!
on 4. December 2022, 12:27 by Samish
Brilliant construction ! A top class puzzle
on 1. August 2022, 10:06 by Christounet
Wow, I'm so glad I dug that up from your older puzzle ! That was so original and well executed ! I didn't know about Masyu Loop puzzles until now, so that made for a brand new entertaining logic process for me. And that was fantastic! Thanks+++
on 1. November 2021, 13:53 by AnnaTh
Wie konnte ich so ein schönes Rätsel so lange übersehen?
on 14. October 2021, 20:28 by Steven R
The two rulesets interact beautifully and it stays fun throughout. Thanks for the puzzle, Jesper!
on 13. September 2021, 18:20 by Jesper
@Mody: vielen Dank!
on 13. September 2021, 09:59 by Mody
Wunderbarer logischer Pfad. Die Kombination ist großartig.
Wonderful logical path. The combination is great.
on 8. September 2021, 05:47 by Vebby
Enjoyed this variant very much! :)
on 23. April 2021, 07:57 by Statistica
Sehr schön. Holpriger Start, aber danach ging es flott.
on 28. March 2021, 19:26 by PixelPlucker
Very enjoyable hybrid! Has lots of deductions that engage both rulesets. Super logically satisfying.
EDIT @PixelPlucker: Thanks! I'm very happy that this puzzle, which had quite a slow start, is getting some more solves. So I really appreciate your comment!
on 12. December 2020, 00:45 by MartinR
Enjoyable solve, both rules nicely intertwined and needed all the way through.
You can see the red stars/ rating now too :)
EDIT @MartinR: Thanks for your comment - I'm really happy that you enjoyed the puzzle! And it is great to finally get a rating on it. Thanks for solving!
on 11. November 2020, 21:00 by Alex
that was a fun sudoku!
on 11. November 2020, 11:34 by Jesper
@Alexander Rappa: thanks, really happy that you enjoyed it! So far I have created two of these. One of them I used as the example. It is uniquely solvable with a logical path, but harder than the 'real' puzzle, and in my view not quite as elegant. Maybe I will create further puzzles of this type in the future (well, assuming this one gets some more solves...), let's see.
on 11. November 2020, 11:18 by Jesper
Reconsidered difficulty level
on 10. November 2020, 22:44 by Alexander Rappa
Really great puzzle! I don't have a lot of experience with Masyu so took me a while to get the hang of it but it was very rewarding. Would love to try more of these now that I fully grasp the rules.
