Copycat Yin Yang
(Published on 17. May 2024, 07:04 by Scojo)
- Normal sudoku rules apply: Place the digits 1-9 once each in every row, column, and 3x3 box.
- Yin Yang: Shade some cells so that all shaded cells form one orthogonally connected area, and all unshaded cells form another orthogonally connected area. No 2x2 area of cells may be entirely shaded or unshaded.
- Copycat Cells: All shaded cells act as copycat cells. A copycat cell's value is defined as the digit in the cell rotationally opposite itself in the grid, regardless of the digit that actually appears in the copycat cell. For example, if r2c3 contains the digit 5, and r8c7 contains the digit 9, and r2c3 is shaded, the value of r2c3 is the digit in r8c7, which is 9.
- Sight Lines: If a cell contains a circle, the value of that cell indicates how many cells of the same color (shaded or unshaded) are seen orthogonally from that position, including itself. The "other" color blocks vision.
- Killer: The values of cells in a cage must sum to the number in the top left corner. Digits may not repeat within a cage, but values may.
Solve in SudokuPad
- Copycat Copycat: featuring Doublers, Slow Thermos, and Entropic Lines.
- Copycat Yin Yang: featuring Yin Yang and Killer Cages.
- Copycat Collaboration: featuring Zipper Lines and Odd Lots. (Collab with several other setters)
- Copycat Blues: featuring Region Sum Lines and Same Difference Lines. (Collab with Marty Sears)
- Copycat Choco Banana: featuring Choco Banana and Arrows.
- Copycat Cipher: featuring Ciphered Digits, X-Sums, and Killer Cages.
- Copycat Kropki: featuring Kropki Dots.
Solution code: The VALUES of every cell in row 8, from left to right
Comments
on 14. July 2024, 07:48 by gdc
Loved it! Took me quite a while to get started but once it clicked, it was such a smooth ride.
on 24. May 2024, 19:43 by Aswen
Wow, that was Superb!
I love the ruleset. Combining killer cages with copycats with sight lines was such a fun combination and it was such a smooth solve once I realized that the copycat values also applied to the sight lines.
on 20. May 2024, 21:25 by yttrio
Superb puzzle! It took me a while to find the logic for determining which cells were shaded vs unshaded (part of which was figuring out the consequences of the rule set), but once things got going it flowed very nicely for me.
on 20. May 2024, 00:14 by karlmortenlunna
Fantastic puzzle! And published on my birthday. Thanks for the gift Scojo :-)
on 19. May 2024, 19:47 by Baklin
Struggled a lot getting my head around these rules. And messed up a few times. But I got through it and really enjoyed it.
on 19. May 2024, 03:07 by jordanp301
@sanabas I feel so silly missing that, thank you. And I agree with @matzrh about making the solution code row 7 and, or row 8 if possible.
on 18. May 2024, 11:47 by matzrh
This was a lot of fun start to end. Challenging, but not frustratingly difficult. Suggestion to @Scojo. Maybe you could use row 7 or 8 as a solution so that the final yin-yang needs to be solved (comments from @jordanp301 and @sanabas), if that's possible without resetting the solvers.
on 18. May 2024, 10:55 by sanabas
@jordanp r7c7 has a circle, which is what resolved the final yin-yang colouring for me after I had entered all the digits.
on 18. May 2024, 10:39 by Franjo
Funny ruleset, made my poor little brain twisting around. In the end it could find the way through. Thank you very much for sharing this gem.
on 18. May 2024, 08:16 by jordanp301
Very lovely puzzle with a fresh ruleset, although I somehow managed to resolve without completing the Yin Yan coloring in 4 cells in rows 7 and 8. Thanks for this beautiful puzzle.
on 18. May 2024, 02:39 by BenTen
Really nice puzzle, scojo. Took me some time to work out the break-in but found it solved smoothly after that. Thanks for sharing.
on 18. May 2024, 01:38 by wuc
Very challenging but huge fun thx.
on 18. May 2024, 00:41 by Opsi
Beautiful puzzle thank you :)
on 17. May 2024, 18:17 by 9Rookienumbers
This was a joy to solve (and caused a bit of an headache), thanks for setting and sharing!
on 17. May 2024, 13:21 by sanabas
Great fun. Very intuitive rules
on 17. May 2024, 12:23 by PhilipNyg
Really fun solve :)
