Castle Wall / Masyu Liars
(Published on 24. January 2023, 09:00 by Agent)
I solved many Castle Wall puzzles recently and really loved it, definitely my favourite loop genre by a good margin. I have several ideas of rulesets inspired from Castle Wall, some of them still in progress. The one I decided to show today is, believe it or not, a liar loop puzzle. It also happens to be the first non-number placement puzzle I'm posting on LMD. I hope you will enjoy!
Rules
- Draw a single closed loop (without intersections or crossings) passing through some cells in the grid.
- Numbers in cells with an arrow refer to the number of cell borders (including the clue cell's border) crossed by the loop in the indicated direction. However, some clues are Masyu Liars in disguise!
- Clues in the grid are either Castle Wall or Masyu clues. All Castle Wall clues must give the correct number of borders crossed. All Masyu clues must give the wrong number of borders crossed.
- Castle Wall: Black Castle Wall clues must be outside the loop. White Castle Wall clues must be inside the loop.
- Masyu: The loop must make a turn in black Masyu clues, but must go straight in both cells immediately before/after the clue. The loop must go straight through white Masyu clues, with a turn in at least one of the cells immediately before/after the clue.
Castle Wall / Masyu Liars (10x10)
Solution code: The number of cell borders crossed by the loop in each row, from top to bottom
Comments
on 2. May 2024, 11:51 by Piatato
Lovely puzzle!
on 13. February 2023, 13:20 by ONeill
Fun ruleset!
-- Thanks ONeill, glad you liked it!
on 31. January 2023, 18:45 by szabog
Thank you, very good combination, I enjoyed solving it. My vote is on the 3 stars, every step was logical, one segment here, one there and at the end there was the loop :) I would be happy to see more, too!
-- Thank you szabog! Glad you enjoyed the combo. It was inspired by the "Castle Wall Delta" and "Castle Wall/Cave" puzzle series.
-- Thx, I will definitely check, but I think this combo, with these rules - especially with the correct and incorrect values - works exceptionally well together.
on 26. January 2023, 08:30 by Christounet
A lot of fun solving this ambiguity puzzle ! I love Masyu, and this combination with Castle Wall was very fun. Rated it 3/5 because I am familiar with both variants, but 4/5 is more likely if you are not. Thanks !
-- Thanks Christounet! I'm glad you enjoyed it and didn't find it too hard, I try to make my puzzles not too hard most of the time :p
on 26. January 2023, 05:22 by Agent
Clarify rules and update difficulty following feedback.
on 26. January 2023, 02:30 by Samish
Some really great interactions in this one! Took me some time to get my head around the rules, but then it flowed nicely. Still it was not easy to find the most fruitful place to look, I think it deserves a 4/5 difficulty.
-- Thanks Samish, glad you enjoyed it! You're probably right that the puzzle is harder than I thought, the solution path is short and not too complicated, but finding the useful clues is more challenging than I anticipated.
on 24. January 2023, 20:03 by KNT
Clarification please: you say "All clues that do not give the correct count must be Masyu", but does this go the other way? By that I mean, if a clue is Masyu, does that necessarily mean the Castle Wall value in the cell is incorrect?
-- Yes, it goes the other way. You cannot have a Masyu clue that gives the correct count, nor a Castle Waĺl clue that gives the wrong count.
on 24. January 2023, 11:32 by MagnusJosefsson
Great puzzle! Some very cool original logic in this one that forces you to really think. Looking forward to more Castle Wall hybrids from you!
-- Thanks Magnus, hopefully I'll be able to find a grid that doesn't break soon :p
