In December 2021 there was a logic puzzle advent calender on mathebau.rocks, containing variants of standard puzzles. These puzzles are now uploaded to the puzzle portal.
Rules: In each region, blacken either no or four (in the region orthogonally) connected cells, such that all black cells are (orthogonally) connected and there is no black or white 2x2 area. If one sees the four black cells in a region as Tetronimo, same tetronimo shapes cannot touch (orthogonally). Rotations and reflections count as the same.
Solution code: For every row the number of black cells
on 4. May 2022, 17:12 by SilBer
Endlich mal wieder ein LITS+ :)