Cygnus (Kurodoko + Yajilin Amalgam)
(Published on 29. October 2024, 04:23 by sfushidahardy)
This puzzle is directly inspired by Agent's brilliant permaculture puzzles. If 'permacultures' of pencil puzzles correspond to 'chaos constructions' of sudoku variants, then I wanted to try making whatever corresponds to 'deconstructions'. I hope you enjoy it! Thank you MaizeGator for the name!
Rules- Amalgam: The 20x20 outer grid contains two (overlapping) 12x12 inner grids which must be located by the solver. One is a kurodoko, the other is a (directionless) yajilin. Clues in the overlap are both kurodoko clues and yajilin clues. Clues which are in neither inner grid are ignored. An "x" clue in an inner grid is designated as "unshaded" but has no numerical meaning.
- Kurodoko: shade some cells so that no shaded cells are orthogonally adjacent and all unshaded cells form a single orthogonally connected area. Clues cannot be shaded, and represent the total number of unshaded cells that can be seen vertically and horizontally including themselves. Shaded cells and kurodoko-grid boundaries obstruct vision.
- Directionless yajilin: shade some cells so that no shaded cells are orthogonally adjacent and draw a loop through all unshaded non-clue cells. The loop travels vertically and horizontally through the centers of cells. Clues cannot be shaded, and represent the total number of shaded cells vertically and horizontally. Only yajilin-grid boundaries obstruct vision.
Hopefully any confusions about the rules can be alleviated by this practice puzzle.
Solve Cygnus on Penpa+. (Recommended.)
Solution code: The cells in Row 12 from left to right. (i.e. the row below the x in the middle of the grid): O for outside (of either inner grid), L for loop, U for unshaded (without loop), S for shaded.
Comments
on 17. January 2025, 15:58 by Piatato
Awesome puzzle, great fun throughout!
on 1. November 2024, 16:34 by ONeill
Impressive!
on 1. November 2024, 11:28 by MagnusJosefsson
Fantastic! Incredibly fun combination, very well put together!
on 30. October 2024, 22:43 by Jesper
Wonderful puzzle! Enjoyed this a lot.
on 30. October 2024, 21:21 by Myxo
Wonderful puzzle :)
on 30. October 2024, 19:59 by The Book Wyrm
Great puzzle! Lots of cool and interesting logic, with a cool ruleset. Very impressive minimal construction.
Not too difficult, at least in the opening, but there were a few tricky parts in the second.
Thanks for the puzzle!
on 30. October 2024, 08:27 by KNT
great! and far more approachable than I was expecting
on 29. October 2024, 16:11 by MaizeGator
I feel like a broken record, but it's another excellent puzzle from sfushidahardy. Knowing all the work that went into making multiple versions of this puzzle, I really appreciate your dedication in never being satisfied unless the final product exceeds all expectations.
on 29. October 2024, 12:06 by Agent
Very nice puzzle, some great logic to locate the 12x12 grids! It was very rewarding how it all comes together.
on 29. October 2024, 04:42 by RJBlarmo
Very nice puzzle! Really enjoyed how the borders of the grids interact with the clues.
on 29. October 2024, 04:32 by zzw
Awesome puzzle! Lots of really interesting steps, fun the whole way through!
