Yin’t and Yang

(Published on 11. August 2025, 10:14 by graggle)

- Normal sudoku rules apply.

- Yin and Yang: Shade some cells such that all shaded cells are orthogonally connected and all unshaded cells are orthogonally connected. No 2x2 area may be fully shaded or unshaded.

- Negative cells: The value of all shaded cells is the negative of the digit in the cell, for example, if a shaded cell contains a 5, the value of that cell is -5. The value of a cell applies to all of the following rules.

- Arrows: Vales along an arrow sum to the value in the connected circled cell. Digits may repeat on an arrow, so long as they don’t break the other sudoku rules.

- All the arrows’ circles are unshaded and hence have a positive value.

- Killer cages: Values in cages must sum to the number in the top-left corner. Digits cannot repeat in cages. (In case it's unclear, the cage at R5C3 has a sum of -2)

- Kropki dots: Cells connected by a black dot have values with a 1:2 ratio. Not all possible dots are given.

Solve it on CTC .

Please feel free to ask any questions regarding the puzzle in the comments and I’ll do my best to respond ASAP :)

Happy solving!

Solution code: Row 7, left to right. Answer should be 9 characters, no spaces.

Solved by blueberrypug, MAWA, jkuo7, Dot, Dentones, bansalsaab, SKORP17, Asphodel, Snookerfan, lmdemasi, Piff, spookyripper, Statistica, DiMono, TitaniaLowe, redgecko, GertVonnegut, lianarox, dogfarts, ghosting, abed hawila, karlmortenlunna, PippoForte, SincereEngineer, palpot, AAAAAAAAAAAAAAAAAAA, galgamer, zonka, WvdWest

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