una isla de pairrows
(Published on 23. January 2026, 00:00 by aqjhs)
- Normal sudoku rules apply.
-
Nurikabe:
- Shade some cells such that all shaded cells are orthogonally connected and no 2x2 area is fully shaded. Cells marked with circles can be either shaded or unshaded.
- A shaded cell with a circle has a digit equal to the count of shaded cells seen in its row and column, including itself. Unshaded cells block sight.
- Each orthogonally connected group of unshaded cells contains exactly one circle and the digit on it is the number of cells in that group.
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A pairrow (pair of arrows) on a cell with a digit D points to two cells D steps away in the direction of the arrows and, depending if the cell is shaded or not, the digits on those cells follow the corresponding rules:
- If the pairrow cell is shaded, the difference of the digits is equal to D.
- If the pairrow cell is unshaded, the sum of the digits is equal to D.
See also:
Solution code: Digits on unshaded cells on row 2 and then on row 9.
Last changed on on 24. January 2026, 19:00
Solved by Alce, ralphwaldo1, SirWoezel, dogfarts, MaxSmartable, ChinStrap, gdc, Piff, palpot, Scojo, karlmortenlunna, Major314, smckinley, emoney1374, sehringdipity, Zzzzz..., snowbaby, War, earthpuzzles
Comments
on 8. February 2026, 04:34 by earthpuzzles
I tried this puzzle a while back, got stuck, and when I came back to it, everything flowed so smoothly!
Then I saw the comment from aqjhs about the update — not sure exactly what changed, but it made a huge difference!
on 24. January 2026, 19:00 by aqjhs
updated puzzle for a better experience :D
on 23. January 2026, 12:17 by SirWoezel
Fun puzzle. 4 stars difficulty may be a bit too high.
