Castle Wall
(Published on 22. January 2021, 10:00 by Mark Sweep)
Draw a single closed loop through the grid without the loop crossing itself. The cells with a thick border are not part of the loop, but have the following requirements: white cells must be inside the loop, black cells must be outside the loop and any gray cell may be either inside or outside the loop. A digit in a cell with an arrow shows the amount of times the loop crosses a cell border in the given direction.
Solve on PuzzLink
Solution code: Column numbers (from left to right) in which the loop turns in rows 2, 7 and 9 (first row 2, then row 7, then row 9).
Comments
on 28. July 2021, 17:50 by Mark Sweep
Updated tags
on 3. May 2021, 14:08 by MagnusJosefsson
Finally managed to complete this impressive and challenging puzzle. I found that I really had to be patient and strict with my logic to stay on track. Great puzzle!
--- Thank you! Great job on overcoming the challenge. Really appreciate your comments.
on 22. January 2021, 21:57 by Mark Sweep
Thanks Dandelo for clarifying it to jessica6. Sorry about the confusion. I have used your suggestion to improve the solution code description.
on 22. January 2021, 21:55 by Mark Sweep
Improved clarity of solution code description
on 22. January 2021, 18:43 by jessica6
Thanks Dandelo for clarification of the solution code.
It's not "column numbers, in which the loop turns from left to right", but "column numbers in which the loop turns, from left to right"
on 22. January 2021, 18:30 by Dandelo
Maybe the following description is better, since you could misunderstand that 'left/right' refers to 'turns':
Column numbers (from left to right) in which the loop turns in rows 2, 7 and 9 (first row 2, then row 7, then row 9).
on 22. January 2021, 16:43 by jessica6
I have a solution. What does "from left to right" mean?
