Castle Wall / Yin-Yang #2 (13X13)
(Published on 27. December 2022, 13:28 by MagnusJosefsson)
Shade some cells in the grid according to Yin-Yang rules.
Also draw a single closed loop through the grid:
- The loop must pass through all of the shaded cells along its path consecutively (In other words, it may only visit the shaded and unshaded regions once each).
- All shaded clue cells must be fully outside the loop.
- All unshaded clue cells must be fully inside the loop.
- If a clue cell contains a value it indicates the number of times the loop crosses a cell border in the given direction(s) combined.
- All shaded cells are orthogonally connected.
- All unshaded cells are orthogonally connected.
- No 2x2 area is entirely shaded or entirely unshaded.
Example:
The puzzle:
Link for solving online:
Penpa+ (Use dark grey shading and green lines for solution check to work)
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Solution code: The number of steps taken between each turn of the loop while traversing the loop clockwise from the first shaded cell to the last shaded cell.
Use 5 for any number of steps greater than four.
For the example, the code would be 1421341.
Comments
on 18. August 2024, 19:50 by Tacosian
Amazing!
on 23. July 2024, 12:07 by Christounet
Awesome ! And with that puzzle, I think I have now completed solving your catalogue. I wish there were more ! Thanks :)
on 12. October 2023, 14:37 by lerroyy
Very nice puzzle!
on 7. October 2023, 12:04 by The Book Wyrm
Very cool puzzle, and a nice step up from the last one.
The minimalist grid was impressive, especially since everything was very well telegraphed and not actually as hard as it looked.
Had some very interesting interactions with the rules, and I liked that there was some kinds of logic used here that wasn't in the small one (and vise versa).
on 23. August 2023, 18:12 by KNT
Finally got around to this! Great puzzle.
on 12. July 2023, 19:02 by peacherwu2
Code checking is killing me...
on 14. January 2023, 00:43 by Qubix
Wonderful puzzle! I really enjoyed solving it. So much new logic emerges in the process. I don't have much expirience, but this must be my favourite Castle Wall puzzle yet.
on 9. January 2023, 06:03 by cmb
From How??? to Wow!!! in Minutes.
Brilliant puzzle.
on 6. January 2023, 13:03 by Myxo
Amazing puzzle!
on 4. January 2023, 04:36 by Twizzy
I love the many interactions with the central blanked region, I'll be keeping an eye out for more hollow puzzles like this. I feel like it also lets you make a bigger puzzle without it getting too monstrous or clue-heavy.
on 1. January 2023, 23:15 by Piatato
Very nice! I really enjoyed the novel interactions between the rules!
on 1. January 2023, 08:22 by filuta
the kind of puzzles I enjoy the most - novel ruleset with a lot of surprising and funny implications, really fun puzzle and also very approachable
on 31. December 2022, 19:11 by Agent
Very enjoyable and surprising puzzle! Some deductions that I didn't appreciate in the first puzzle were very useful here.
on 31. December 2022, 10:48 by Mark Sweep
Wonderful! I learnt a lot of new characteristics of the ruleset in this puzzle. Also, I thought the steps were nicely telegraphed throughout, even if they weren't too easy to actually convert.
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Thank you for your very kind words Mark, I'm really glad you liked the puzzle. /Magnus
on 31. December 2022, 05:55 by Samish
Thank you so much for setting this. Mind-blowing puzzle!! The break-in is extraordinary and the solve full of amazing discoveries. One of my favourite puzzles
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Thanks a lot for your wonderful comments Samish, I'm really glad you had that kind of experience with the puzzle! /Magnus
on 27. December 2022, 21:05 by Dandelo
Aaaargh. I've tried the wrong version all the time. What is strange: I came to the intended solution several times, but the solution check never triggered.
A very nice puzzle anyway.
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I'm really sorry about that. I try to be very careful and have never posted a broken puzzle before, but somehow this went unnoticed despite several multiple solves during testing. I also wish there was some technical way to alert solvers who may have started the puzzle when a problem is discovered. Anyway, really strange about the solution check, it definitely worked for me. /Magnus
on 27. December 2022, 20:19 by ONeill
Superb! It was a lot of fun figuring out the implications of the ruleset in a larger grid. Thanks Magnus!
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Thanks a lot ONeill! /Magnus
on 27. December 2022, 19:09 by Niverio
Very enjoyable puzzle! The minimalistic nature of the puzzle reveals its secrets as one understands the intricacies of the ruleset better.
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Thank you Niverio! Really glad you liked it despite the problem with the initial posting. /Magnus
on 27. December 2022, 18:41 by MagnusJosefsson
Fixed broken clue. The 6-clue in R5C2 was previously mistakenly a 5. My sincere apologies, somehow this passed all testing unnoticed. Thanks Niverio and polar for the heads up.
on 27. December 2022, 17:32 by MagnusJosefsson
Revised German translation
on 27. December 2022, 17:28 by Dandelo
To be sure: If there are several arrows, the sums in all directions are counted together?
In the English rules it is said 'combined', so I think this is true, but in the German rules this is missing, so you can read it in several ways.
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Yes, all directions added together. I'll try to revise the german translation. /Magnus
on 26. December 2022, 22:02 by MagnusJosefsson
I would highly recommend solving the introductory puzzle (id=000CBD) before attempting this one. Otherwise, there is a risk that the break-in might feel a bit tricky. Following the break-in, the rest of the puzzle should be quite smooth given some previous experience of the ruleset.
