This genre has a nice name. Creator's time: 1:38.0 Rules: Standard Landvermessung Rules \ Shade some cells such that no closed loops exist among the shaded cells (not even a 2x2). A clue indicates the number of cells in the shortest path of shaded cells that visits all of those touched by the clue. An infinity (∞) clue indicates that no such path exists. Difficulty : 5.5/14 Online interface (Penpa+)