Shade some cells to leave behind a single connected group - the cave - with no enclosed, shaded cells. In other words, all shaded cells must be connected by other shaded cells to an edge of the grid. All numbered cells must be a part of the cave, with each number indicating the total count of cells connected vertically and horizontally to the numbered cell including the cell itself.
Solution code: First the number of orthogonally connected blackened regions. Then the sizes of the 3 biggest black regions in decreasing order.
on 24. December 2022, 00:31 by TJReds
penpa link: https://tinyurl.com/2ksypdgf
on 6. September 2020, 12:11 by Lucx
Die Borkenkäfer bedanken sich für das schöne Rätsel ;-)
on 4. November 2019, 15:39 by CHalb
Auch dieser Baum hat Spaß gemacht. Danke für die herbstliche Unterhaltung :-) !