Cave / Directionless Yajilin Permaculture
(Published on 21. August 2024, 09:00 by Agent)
Rules
- Divide the grid into 2 areas of orthogonally connected cells. One of them is a Cave, the other is a Directionless Yajilin.
- Cave:
- Shade some cells so that all unshaded cells are orthogonally connected, and all shaded cells are connected by other shaded cells to an edge of the Cave area.
- Clues cannot be shaded, and represent the total number of unshaded cells that can be seen in a straight line vertically and horizontally. Shaded cells and permaculture borders block vision.
- Directionless Yajilin:
- Shade some cells and draw a non-intersecting loop through the centers of all the remaining empty cells.
- Clues cannot be shaded, and represent the total number of shaded cells that can be seen in a straight line vertically and horizontally. Permaculture borders block vision.
- Shaded cells in the Directionless Yajilin area cannot touch another shaded cell orthogonally, not even across a permaculture border.
Example puzzle (9x9)
Main Puzzle (19x19)
Solution code: Column 15 (fifth-to-last) from top to bottom. Enter S for a shaded cell of the Cave, C for an unshaded cell of the Cave, X for a shaded cell of the Yajilin, and Y for any other cell of the Yajilin.
Comments
on 18. April 2025, 07:13 by askaksaksask
Gosh this was a blast. Very tricky start, very consistent throughout. This puzzle is difficult by two metrics-- the wonderful complexity of the ideas AND how remarkably easy it is to make an impactful mistake that you'll only realize very many steps later. Genius puzzle, Agent. This was such a joy. Thank you!!
on 23. January 2025, 08:54 by SamuPiano
What a journey! This is the best permaculture I've ever solved, and I loved every minute!
on 8. January 2025, 16:29 by Piatato
Fantastic! So much fun throughout!
on 22. October 2024, 10:19 by KNT
One of my most fun solves in a long time
on 21. October 2024, 22:28 by sfushidahardy
Without a doubt the hardest/most intricate puzzle I've solved to date! Worked on it over three days, but loved every moment. Thank you!
on 20. October 2024, 07:11 by BloodbuzzCorio
Agent I am simlpy in awe of the brilliance and beauty of this puzzle - and slightly in awe of myself that I managed to solve it! I took a couple of wrong turns during the solve, which I guess is easy to do given the size and complexity, but I can't remember the last time I got such a sense of achievement from completing an LMD puzzle. Thank you!
on 30. September 2024, 05:17 by Christounet
Great ! Surprisingly, it took me more time to find the opening of the example. The main puzzle is the kind of huge grid I enjoy immensely. Thanks :)
on 29. September 2024, 22:27 by Myxo
Awesome puzzle!
on 19. September 2024, 14:16 by Alex
what ibag says :)
Especially one wrong assumption in the beginning and one silly mistake towards the end. Epic!
on 13. September 2024, 21:15 by Statistica
Ganz großartig. Hat viel Spaß gemacht!
on 8. September 2024, 16:22 by Agent
Added example puzzle.
on 28. August 2024, 15:44 by ibag
Fantastic! Took me a long time to get rid of all errors.
on 27. August 2024, 17:36 by MagnusJosefsson
Amazing puzzle! Consistently challenging and incredibly rewarding!
on 24. August 2024, 01:06 by ONeill
Epic puzzle! Very satisfying to solve :)
on 23. August 2024, 23:18 by Agent
Added link to an example.
on 22. August 2024, 01:25 by Jesper
Awesome puzzle, quite a journey, thanks!
on 21. August 2024, 22:25 by JustinTucker
I've got 3 questions.
1. By "permaculture borders" you mean the border between the two main areas?
2. The clue number in a cave includes the cell itself?
3. The loop is only allowed to move orthogonally over cell borders?
Thanks.
-- @JustinTucker, the answer to all those questions is yes.
